Our C has cabinets above the cab, no bed, with the TV "hole" in the middle. Tossed that old small TV and got a swing-out arm attached to the side of the "hole" where there is a good piece of wood in the corner of the cabinet to take the screws--has to be strong for the TV on the arm when hitting bumps on the road or whatever.
Got a 32" TV that goes on the arm and it sits across the "hole". The TV can be aimed and it tilts down a little so it is good for viewing. It does not flop around going down the road, but Bungy cords to a hook inside the "hole" could hold it.
TV plugs into 120v (inverter powered when off-grid) and uses the same antenna panel as the old one for the coax. The "hole" is a good place for the DVD player if its remote can see under the TV ok.
TV can be pushed aside and pulled out to open the cabinet doors