Script Handle? : Contextly

As above, the link as below.
http://ww.wp.xz.cn/support/topic/minifying-issues?replies=1#post-5023173

I’m having a problem with the JS minifying. It is good, but when I can’t find the script handle. How do we do that? What do we look for? Do you have a tutorial or a guide? =) Would appreciate pointers, I can look out for the solution myself.

http://ww.wp.xz.cn/plugins/bwp-minify/