Round plug or square ?

[Roy Bean]

I bought three CB 750 Hondas. The one I am working on first has a build date of 6/72. Vin starts with 20462.. Does anyone know if the ignition sub wiring has the round plug ? The wiring is butchered on this bile and it only has one fuse. I need to get a harness and want to get the correct one.

 

[Roy Bean]

It seems if the wiring harness has one fuse the bike has a round ignition sub harness and if the bike has three fuses it has the square plug.