Repairing holes in walls or mollys for tv mount

+1 on the picture.

Isn't amazing how there are no studs? Not really though. It's called the least costl (think cheap and quick) construction. Only place there will be 'studs' is where something attaches outside or inside and 'studs' is a relative term. More like 1" square strips of ripped pine, stapled (not screwed) together. The RV industry loves air staple guns, Number 2 or 3 grade construction pine and quick assembly.