Vintage 70s Shadow Acoustic Pickup System

This came out of my old Harmony. I’ve had it in there at least 30 years. It worked great then I pulled it out and I noticed there was a black wire disconnected near a thumb wheel and the orange wires for the contact pickup and output are cracking. So this is an as is sale. It functioned when I removed it a couple weeks ago but I don’t know if this wire came loose before or after so this is as is. It’s a vintage Shadow pickup system. It has a magnetic humbucker that fits in the sound hole and there’s a button style contact pickup for behind the bridge. There are two thumb wheels on the sides of the humbucker. One is a master volume the other is a blend for the two pickups. Passive system, no battery required. It was cool and sounded good.