can't add default access role to enterprise application

I have added a user for my Enterprise Manager, but I noticed the role assigned is not the 'Default Access' role. It's a different role ('Tester').

 

When I initialy created this user, there was no option for the 'Default Access' role. It only had 'Tester'.

 

I want to change the role of this user to 'Default Access', but I couldn't find where to change it. I was wondering if you know where to change the role?