If it's like our Monterey, Dale, you should be able to pop upholstered buttons off the corners of a panel facing the windshield. There may be a small vent in that panel also removed that way, but with limited access to the rear of the TV. If the TV is a newer replacement, the installer may have modified the front woodwork, adding wood decorative buttons. Removing any buttons very carefully by gently prying with a small screwdriver or with a knife blade should reveal rear panel or front framing screws.
Joel
