I was finally able to put in the switches and hook up the controls tonight/this morning.
Here it is. The jukebox software started right up and everything worked perfectly on the first try.
Closeup of the buttons. The protective coating is still on the plexiglas.
Here’s the rat-nest of wires in the back. I don’t have cable ties on anything yet. The keyboard encoder is just taped to the side with double sided foam tape. The terminal strip is screwed to the bottom.