Here's manual for KBCC-255
It is controlled with analog signal. Ground to P1 and signal to P2.
The only wires going into the control ( excluding the main 240v ) is red, white black that are coming from the power supply. Then blue and yellow that are coming from the PC
I never worked out the wire colors on this one. Maybe someone else who has this dyno will know which wire colors are for what.
@ronperek I just ordered a picoscope so hopefully with some help I'll be able to sort it out. I'm out of town this week until Friday so I will be attempting the conversion next week.
Mine doesn't have anything hooked into P1 or P2 in the strip at the bottom. It seems that it has a small board on top raised above the main board that has a 5way flat connector but the pins aren't labeled
