IMHO... Do Not Trust The Factory TV Mount!!! That said, where ever you choose to mount your TV take the time to securely mount it. I cut about a 12" x 12" piece of plywood,
and used 16 short (3/4") fat wood screws (12 around the edges and 4 into the factory mount), and Gorilla glue on the back of the plywood. Put a piece of blue painters masking tape on the bottom edge so glue doesn't run down the wall. I originally used the factory mount and after a day of mountain driving found my TV on the floor, bracket and all. After 6,000 miles I always find my TV where I mounted it!
I ran into a guy with a mirror image of my 177se in Yellowstone who had fabricated an extension to his bracket to allow it to be viewed from the dinette. Seemed to work for him. I personally only watch a limited amount of TV on the road and do so from bed.
Good luck and remember... Don't trust the mounting plate!
2015 177 SE 1990 Chevy Suburban 5.7L