After installing the plugin you must do the following.
- Enable the plugin on the Enrolment methods page (e.g. http://localhost/m35/admin/settings.php?section=manageenrols).
- Create custom profile fields in the User profile fields page (e.g. http://localhost/m35/user/profile/index.php), because the plugin doesn't work with the built-in profile fields.
- Configure the plugin to select all the custom profile fields that you want to enrol based on (see http://localhost/m35/admin/settings.php?section=enrolsettingsattributes).
- When you go to the enrolment methods page for a course (e.g. http://localhost/m35/enrol/instances.php?id=3), and click on the Add method drop-down field, then you will see the method "Enrol by user profile field" available in the list.