This is the one I used for my 2017 265RLSW. I mounted one in the entertainment center (32” TV) and one in the bedroom (27” TV). Mine had a piece of plywood mounted behind the wall. I sent an email to Jayco Service and requested the blue print of the walls to know exactly where the TV support plywood was located and they responded quickly with both prints. Having the blue prints took the guess work out and you know precisely where the support is along with exact wall thickness so you don’t drill all the way through with your pilot hole. Hope this helps.
VideoSecu LCD LED Monitor TV Wall Mount for 15" 17" 19" 20" 22" 23" 24" 26" 27" Flat Panel Screen Maximum Loading 66lbs VESA 75/100 - Ultra Thin Mount Bracket 1EA https://www.amazon.com/dp/B000VKCIJU..._MUinAbFRSF6GK