We have a lot of cables. I wanted to hide that mess.
I'll be adding a back plate made out of MDF. First I cut it down to size to cover what I wanted, and then off the final piece cut a flap for the hinged door. Gave everything a light sanding before paint. Though I decided to only paint one side.
Used a bunch of wood screws to mount it.
I also wanted to mount the surge protector to keep it from dragging around the floor every time we move the TV. I cut out a small strip of wood, pre-drilled recessed holes, traced the mounting bracket and fitted the strip of wood just under the back plate.