I suggest you pull the access panel below the TV shelf you use to access the winterizing valves, you can see for yourself what goes up and down where. Personally I mounted about a 8" square 1/2" plyboard and put the articulating TV mount over that, as the wall is only 3/16" thick 3 ply plywood behind the wall covering. Originally I took the OEM wall mount out and put an Amazon.com articulating mount in its place over the plyboard, reusing the original Jensen OEM TV. I took a luggage strap with quick release snap and mounted it between the mount and the wall and can strap the TV tight to the wall when traveling.
I just replaced the Jensen with a 32" $199 Black Friday LED TV and have it tied to the same articulating mount but also use the TV stand, sitting on the shelf raised up with a 3" 1/2 hollow rectangle plywood platform . The wall mount is mainly just to be sure it does not go anywhere when traveling, and I still use the luggage strap to secure it when traveling. I can still move it around thanks to the articulating mount.