Just concluding this. Campers buttoned up. Nice to do a project cause I want to.

Got the vent rewired. Cut interior sleeve to fit, bit tight as it slips between the fan control plate and exterior sleeve that drops down. Theres only about a 1/16+ gap sleeve slides between. With the vent at an angle in relation to interior ceiling takes abit to get started but otherwise slipped right in.
Slides not completely out, but a bit awkward for me to reach the knob because of slide floor in front of the refer.
Trimmed the ceiling panel trim. Started picking up the camper. Pretty happy, got AC back and keep our vent...
Margaret came out, shes is really happy with the new AC as the heat really bothers her. She was impressed with the vent over the fridge, "This will be nice, its better over to the side as its always dark on this side", then steps up on the slide floor in front of the fridge like shes been doing it forever, opens the vent. "Perfect" She says and closes the vent. "Do you need any help putting your tools away?" Uhh, no I got it, thanks. And she goes back to the house.
Standing there for a minute, I step up on the slide floor and reach for the vent...huh.