Here's something to try.
Create a rule that fires on Library Load (page top).
In that rule, add an action (Set Variables) from the Adobe Analytics extension.
At the bottom of the AA Set Variables configuration page, click the `</> Open Editor` button to add custom code.
Here, you will have access to the "s" object. You can add your configuration setting in this window.
s.ActivityMap.regionIDAttribute = ___your desired value____
Then save this action, save this rule, add to the library, build for dev, and test it.