Smoke coming out under hood Class C Majestic, What is it?

Here are the pictures:




I don't immediately recognize this potted component, which certainly did get very toasty. It doesn't really look like a battery isolator to me. Can you tell what it connects to? And also maybe describe more precisely where it is under the hood?

Edit: it also is very unlikely to have anything to do with the AC power generator. Any potted bits associated with it would be in the generator itself, not some random block mounted external to it somewhere.