I just picked up a 2015 378TSXL from a dealer and they were not real helpful with the TV system. The coach has a living area, bedroom, and outside TV. There is also a satellite installed and there is a Wally box. There is not switch in the cabinet for the three TVs as I have seen on other coaches. Does anybody know if the three TV's are wired back into that overhead cabinet so inputs can be shared? Also can the Tv's run off the invertor?