It looks like a motor generator. It has a red wire and black wire hooked to it. then the box on top has a 110v female plug on top. like you would find in your wall. I don't know. it is weird. It seems to put out 110V I don't know why it's there. I never seen one in my life. I have owned a vogue (I lost from storage fees) two superiors and this Holiday rambler, and I have three buses and never seen this thing before. I thought maybe for the jacks but that motor is in the house battery compartment.