Subdirectory Multisite using NginX: https only?

sites-available file looks like this:

##
# You should look at the following URL's in order to grasp a solid understanding
# of Nginx configuration files in order to fully unleash the power of Nginx.
# http://wiki.nginx.org/Pitfalls
# http://wiki.nginx.org/QuickStart
# http://wiki.nginx.org/Configuration
#
# Generally, you will want to move this file somewhere, and start with a clean
# file but keep this around for reference. Or just disable in sites-enabled.
#
# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
##

#map $http_host $blogid {
#    default 0;
#    include /var/www/html/wp-content/uploads/nginx-helper/map.conf;
#}

map $uri $blogname{
    ~^(?P<blogpath>/[^/]+/)files/(.*)       $blogpath ;
}

map $blogname $blogid{
    default -999;
    include /var/www/html/wp-content/uploads/nginx-helper/map.conf;
}
 
#
# Default server configuration
#

server {
    listen 80;
    listen 443 ssl http2;

    server_name software-enabled.com www.software-enabled.com 139.59.187.99;

    if ( $scheme = "http") {
        return 301 https://$server_name$request_uri;
    }

    root /var/www/html;
    index index.php index.html index.htm index.nginx-debian.html;

    # ESSENTIAL : no favicon logs
    location = /favicon.ico { log_not_found off; access_log off; }
    
    # ESSENTIAL : robots.txt
    location = /robots.txt { log_not_found off; access_log off; allow all; }

    # ESSENTIAL : Configure 404 Pages
    error_page 404 /404.html;

    # ESSENTIAL : Configure 50x Pages
    error_page 500 502 503 504 /50x.html;
	location = /50x.html {
		root /usr/share/nginx/html;
	}

    # PERFORMANCE : Set expires headers for static files and turn off logging.
    location ~* ^.+\.(js|css|swf|xml|txt|ogg|ogv|svg|svgz|eot|otf|woff|mp4|ttf|r
ss|atom|jpg|jpeg|gif|png|ico|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav
|bmp|rtf)$ {
        access_log off; log_not_found off; expires 30d;
    }

    # SECURITY : Deny all attempts to access PHP Files in the uploads directory
    location ~* /(?:uploads|files)/.*\.php$ {
        deny all;
    }

    #
    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    location ~ \.php$ {
	include snippets/fastcgi-php.conf;
	fastcgi_pass unix:/run/php/php7.0-fpm.sock;
	}

    # Nginx Rewrite rules attempt by Ian W

    location / {
	try_files $uri $uri/ /index.php?$args;
    }

    location ~ ^/files/(.*)$ {
        try_files /wp-content/blogs.dir/$blogid/$uri /wp-includes/ms-files.php?f
ile=$1 ;
         access_log off; log_not_found off; expires max;
        }

    location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
	 expires 24h;
	 log_not_found off;
        }

    location ^~ /blogs.dir {
	 internal;
	 alias /var/www/html/wp-content/blogs.dir ;
	 access_log off; log_not_found off;      expires max;
        }

    if (!-e $request_filename) {
	 rewrite /wp-admin$ $scheme://$host$uri/ permanent;
	 rewrite ^/[_0-9a-zA-Z-]+(/wp-.*) $1 last;
	 rewrite ^/[_0-9a-zA-Z-]+(/.*\.php)$ $1 last;
        }
	
    # End of Rewrite Code!

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    location ~ /\.ht {
		deny all;
    }

    access_log  /var/log/nginx/$host-access.log;
    error_log   /var/log/nginx/wpms-error.log;

    ssl_certificate /etc/letsencrypt/live/software-enabled.com/fullchain.pem; # 
managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/software-enabled.com/privkey.pem; 
# managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

#
# Virtual Host configuration for ianwaring.com/www.ianwaring.com
#
server {
    listen 80;
    listen 443 ssl http2;

    server_name ianwaring.com www.ianwaring.com;

    if ( $scheme = "http") {
        return 301 https://$server_name$request_uri;
    }

#    root /ianwaring/;
#    index index.php;

    location ~ ^(/[^/]+/)?files/(?<rt_file>.+) {
	try_files /wp-content/blogs.dir/$blogid/files/$rt_file /wp-includes/ms-f
iles.php?file=$rt_file ;
	access_log off;	log_not_found off; expires max;
    }

#    location / {
#      try_files $uri $uri/ /index.php?$args;
#    }

#    location ~ ^/files/(.*)$ {
#      try_files /wp-content/blogs.dir/$blogid/$uri /wp-includes/ms-files.php?fi
le=$1 ;
#      access_log off; log_not_found off; expires max;
#    }

#    location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {
#	expires 24h;
#	log_not_found off;
#    }

#   location ^~ /blogs.dir {
#	internal;
#	alias /var/www/html/wp-content/blogs.dir ;
#	access_log off; log_not_found off;      expires max;
#    }

    if (!-e $request_filename) {
	rewrite /wp-admin$ $scheme://$host$uri/ permanent;
	rewrite ^/[_0-9a-zA-Z-]+(/wp-.*) $1 last;
	rewrite ^/[_0-9a-zA-Z-]+(/.*\.php)$ $1 last;
    }

    access_log  /var/log/nginx/$host-access.log;
    error_log   /var/log/nginx/wpms-error.log;

    ssl_certificate /etc/letsencrypt/live/ianwaring.com/fullchain.pem; # managed
 by Certbot
    ssl_certificate_key /etc/letsencrypt/live/ianwaring.com/privkey.pem; # manag
ed by Certbot

}