The issue was the previous owner had literally torn the backbox off of the cabinet, and had snipped the two bundles of wires connecting the two (at least 50 color coded wires). So it required woodwork to mount the backbox back on, and rewiring.
It sat it my garage for a few months before I accepted that I wasn’t making progress and I gave it to a friend.
Anyway, yeah, people dump this stuff! My hobby dev project is a pinball one, so it felt very serendipitous to find one sitting on the side of the road.