My '66 TW has holes next to the front window for an antenna. As we were about to leave the PO with the trailer he said wait then came back with the antenna. The wire for it went down inside the wall, under the floor and up to an antenna plug on the shelf on top of the fridge. Not really much room for a TV but it looks like a factory installation. Maybe your antenna wires also go down the wall to wherever too? I have not installed my antenna but cut patches from aluminum tape to cover to outside holes. You can hardly see the patch.
Neil and Lynn Holman
Kirk Creek, Big Sur, Ca. coast.
1966 Trade Wind
1971 Buick Centurion convertible
1969 Oldsmobile Ninety Eight