Once you are into the fridge compartment, put a connector on the coax. When you deploy the tailgater, use RG-6 coax to hook up to the connector in the fridge compartment through the door, left open in a crack. Or you could drill a small hole in the door or the trailer skin and use a 75 ohm double female connector.
Another alternative is to use the Cable TV coax. If your trailer has the two connector plate with the jumper on it for TV cable you can hook the Dish receiver up to that and then hook the tailgater up to the other end, wherever that is located on your trailer. If not, you can add one.
Here is a link to what I did:
https://www.airforums.com/forums/att...6&d=1469409767
You will note that I also mounted the DirecTV receiver vertically. The remote worked fine. Apparently there was enough scattering of the IR off the wall to close the link.
Al