Hey Machtec54, The Reference "C6" board is not valid, I have no C6 board. Here's the drawing for my current hook up. Again the (mach3)computer to usb, to Warp9td Board to 25 pin parallel cable. from that cable to Gecko G540 Driver Board. drawing shows pin layout for the g540 board. g540 pins 7/8/9 to the KBIC board, which is the spindle driver board. from 120v ac to 90 vdc. the KBIC board also create's the 10V for the pin out of P1/P3. So P1 is 10+ , P2 is the whiper, P3 is the 10- . (it was using a 5k Pot switch to throttle the speed.
I hope this is not confuseing for you.
Tim