ADDING PHP CODE WPAMELIA AND WPCONTROL

Hello,

I can’t add the code below for the appointment reminder notifications with the plugin WPAMELIA.

*/15 * * * * https://monsite.fr/wp-admin/admin-ajax.php?action=wpamelia_api&call=/notifications/scheduled/send

I don’t have this block to add the code like
https://prnt.sc/14v6agd

I followed your link:
https://wpamelia.com/notifications/

https://prnt.sc/14v5lpi

Can you help me to fix my php code please?

Thank you