If it's like my 02 325S, the centerline TV cabinet doesn't go all the way to the windshield. There's a rectangular ventilation grill on the front face of the box (winshield side) that is held by 4 screws. Once you remove that you can get to all the wiring and to the tie-downs.
I haven't tried actually taking the TV set out, as I was in there to hook up a VCR and a DVD player. I would imagine the decorative trip around the TV would have to come off. On my rig there are two screws in each edge of the frame, covered by wooden buttons.
Frank and Eileen
No longer RVers or FR owners