I was able to mount to the frame, but don't go by seams in the wallpaper.
Chances are there should be a backing plate in the walls near any wall plate with the antenna and cable hookups.
In our previous Heartland Trail Runner TT, there were stickers on the wall showing me the general vicinity of a backing plate in the wall, which I found by putting my thumbs together and pressing on the wall until I found a hard spot about 10x10 inches (after drilling holes in the wall where the sticker was only to find no backing plate
![Mad :mad: :mad:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
).
This was in the bedroom of our Trail Runner . . . note how far off the sticker was compared to where I eventually found it and mounted the TV bracket.
The living room sticker was right on:
Our Prowler had a sticker in the bedroom, and it was right on, but the entertainment center didn't have a sticker or a backing plate, but I did manage to find a metal support beam right down the middle using the two thumbs together and press method.
Bigger TV coming soon . . . this is the same TV we had in the living room of the Trail Runner, as is the bedroom TV in our Prowler.