Hi, just received our new 65" OLED TV and trying to figure out how finish the built in entertainment center and whether or not to wall mount the TV and if so, how. First, a woodworking question. On the left in the picture is a finish piece that appears to go under the top cabinets. How can I attach that? (Beginner woodworker). Next, to wall mount or not? And how? the finish piece on the right is 3/4" ply, the wall behind is simply sheetrock/ wood studs. Initially my plan was to cut out a piece the size of the mount and attach the mount directly to the wall. Now realizing that that might not be the best plan given the space lost between the wall mount and the TV (the width of the plywood). I could drill through the plywood to the wall studs. Pros/cons/ suggestions? Of course the kids want this done yesterday.