Connecting the Roland RG-3-PE piano pedal

Roland RG-3-PE piano pedal wiring

Hi!

Can anyone help me with the wiring diagram for a Roland RG-3 pedal?
Unfortunately, I can’t find it anywhere, and the cable connecting the piano and the pedal is broken.
We don’t know the wiring diagram anywhere, and so the pedal is unusable.

I’m currently not near my schematics but if you have a test meter try and probe each pin to a point on the pcb, the one pin which doesn’t beep out will be the broken one, map out the pins to colours of the wires and you’re half way there. I’ll check back if I manage to find the pinout.