How to link a Wordpress user role to a cluevo LMS Group?

Question

I would like to have the following process implemented when users register on my wordress site : If registration of user has a specific domain name email, then they are automatically assigned to a Groupe of users in Cluevo LMS Plugins.

I have used the code found here :https://isotropic.co/how-to-set-wordpress-user-role-based-on-email-domain/ to link domain names of the email user to a specific Wordpress role.

However, how can I link a wordpress role to a Group in Cluevo LMS ? In the plugins there is an option so that new users are as default assigned as users, you can uncheck this option.

However, I would like that : ->default roles = to regular user Group; -> role X = Premium Group

I use WP User Manager to manage roles but cannot find options to link a role to a specific group. Any idea how to do this ?

Thank you very much !