New prototype truck camper

OK, I get that but in the case of a truck camper is there some sort of interconnect for when the camper is on? It would have to be electrical, and that's going to be connected anyway. I can't see a radiator fluid connection between the two. If it's an electric heater, and heating the camper while underway would just be the same as, well, leaving the heater on while you're driving. Nothing really groundbreaking about that.

Maybe I'm overthinking this. It's late for me... :)

-Joe