Hi,
I have a PX-160 and I purchased an SP-34 pedal unit. The SP-34 has a 6 pin mini din (male) plug, and they keyboard has a straight 5 pin (jst sm, I think it's called) input for the 3 pedal unit. I'm trying to create a connector. I have a PS/2 receptacle (https://www.adafruit.com/product/804) and I have jst sm with 5 pins cables. (https://www.adafruit.com/product/1664). And now I am stuck. Should I purchase a jst sm cable that has 6 wires coming out of it instead of 5? Or is one of the wires in the SP-34 useless? Also, I need some pointers on how to wire them together if anyone sees this.... Do I just connect the ends of the wires? If so, which to which? Any advice would be much appreciated. New at this but determined!