If you are a Summit user for a MAT, you will be able to view the individual Connect accounts for each of your schools/colleges. 

To do this, simply press View as School/College in the left menu. 

This will bring up a list of schools/colleges in your MAT, and you can press the person icon access each account:

Please note, you will only have standard user access in each Connect account, if you need admin rights or access to data uploads, you will need adding as a user to each account.