Enabling Google Analytics
Enabling Google Analytics is a simple task done through Account Settings, here you have full control over the custom variable push and the association of relevant slots
Make sure you're NOT overriding preexisting used slots (Google is limiting the number of custom variables to 4-5 on the free version)
Importing Google Analytics Dashboards
Click on Import from Gallery
Search RTP
Select B2B or Performance dashboard (B2C)
When done - you'll see the dashboard on your list