They might just be paperweights if you hook to power according to the end plate picture. The REMOTE and GROUND connection are reversed, (at least from every other component I've ever seen) make sure you do a continuity test on the board or connectors before putting power to it. Maybe this is why they never made it thru productionI'm ok with no cases (they're in a frame of sorts from the pics anyways) I would imagine they work though...if not..pretty paperweights....
Looks like this might be it:There was a post about these or something very similar to them a good while back. May want to try searching for the old thread.