Maybe you added yourself as manager to another GMB but haven't seen it in your account yet, or maybe you just want to enable it in general. There are 3 ways to accomplish that!
To enable locations in Local Viking, navigate to the 'Locations' tab at the top of your screen.
From there, you'll see entries that are gray. That means those locations are disabled in the account for management.
You have a few options to enable the location:
One way is to look at the 3 horizontal dots on the far right.
Click on those and you'll see the 'Enable location' slider:
Another way to enable is to click on the location. From there you'll see this option:
The third way to enable a location is to click on your email in the top right corner and select the 'Google Accounts' tab.
From there, select the Google Account associated with that location. Once you've navigated into that page, you'll see slider buttons next to all the locations: