our 320 has the same ceiling outlets in the bedroom. Our dealer said there is no factory instruction for where exactly to mount one. they recommend nothing more than 20 inches on a wall mount. He did NOT recommend mounting to the ceiling.
His reluctance to mount one was sobering, we do not need one in there, and probably will not. If we do, I will look for something that spreads the load as much as possible.
2013 Coachmen Freedom Express 320BHDS pulled by a 2005 F250 King Ranch CC
A rainy day camping is better than a sunny day at work.