tinkerman here is another option. Along about 1960 OMC decided to do away with that trouble connector. They ran the battery and ignition wires from the motor through the cowl and connected them in the junction box. I had the same issue as you on my 1957 fast twin electric. I found a set of jumper-cables and cut off the clamps. I wanted a red and a black colored wire and made my own wire loom with a starter wire and choke wire. It came out pretty darn good. I know it’s not original! The wiring connectors are worth more than several motors. Sending some pictures.
dale
