Access Levels not integrating with Member Roles

I am in the process of setting up a new site and I have created access levels via your membership plugin. When I start setting up the settings to the directory plugin, I click on membership roles to select the access level I want able to access the capability to create a new member in the directory, and all I see are the membership roles which are not linked to any access levels…. How do I link Access levels and Membership roles?

I don’t know if that makes sense or if I need to explain it further, but any help would be greatly appreciated!

Thank you

Josh