To check out the working of the User Connections Plugin, you can use the following logins:
1) test1@seaddons.com/123456
2) test2@seaddons.com/123456
3) test3@seaddons.com/123456
4) test4@seaddons.com/123456
5) test5@seaddons.com/123456
6) test6@seaddons.com/123456
After logging in with one of these, you can try looking at someone else's profile from amongst these. The connection limit that has been set up in the Admin Settings for their member level right now is : 6