How do I find the OAuth connection string for a Salesforce Marketing Cloud Connection?

I am trying to figure out where the connection string lives for the OAuth connection that was previously setup in my Matillion environment (v1.61.6) but nothing in the "Manage OAuth" tab tells me where the current connection is pointing to.

 

We have two different Salesforce Marketing Cloud instances and before I reach out to my CRM admin, I was hoping to find the URL of where the current OAuth connection is pointing to.

 

Thanks!