Front TV is not hung in a similar fashion. On the back of the TV is a mounting plate attach with 4 screws or bolts. The plate has 4 studs sticking out which mount through holes in the cabinet face and washers and nuts hold the TV in place. Not sure about yours being the same, but, you reach those nuts inside the cabinet through access holes inside the cabinets adjacent to the TV cabinet. The cabinet on the right is the easiest to use because there is usually less equipment if any in that cabinet. One person holds the TV from falling while the other reaches in with a socket and ratchet set. After removal you can disconnect the wires.
This is what you might find. The mounting plate studs slide through panel. The tape you see is from my removal of the TV and reinstallation. It was mounted crookedly at the factory. The tape made it easier to mark the new hole locations. This is a 2014 33c method of hanging the front TV. I'm thinking yours is similar.
VIEW BEHIND THE TV