Thanks for all the feedback. I think these 3 pics may help. The wires going to the accessory (crane) have not been touched and original. I split them so I could run them below my last layout. I used a simple pin connector to reconnect them. When tearing down, I separated with keeping a map from the controller to the terminal.
In one pic, I've marked each wire and terminus according to the schematic. I'm 95% confident these are right. 6 for sure goes to the binding post on the crane. But, I don't know where o connect that wire on the controller.
The 6 wires came into the controller and are soldered at points marked A-F.