Help with THC wiring

[TCF Engineering]

Hello, I have had a plasma table for the last 4 years. I built the mechanical side and bought the electronics. I am totally clueless when it comes to the electronics side, so I bought a Proma THC as it looked the most simple way to do THC

Now it comes to wiring it up and I cant figure it out, so I am after some help

http://proma-elektronika.com/index.p...compact-thc-sd

This is the THC I bought, and I have attached a picture of my card which is going to the Z axis. How do I identify which wires are which going to the Z ? Can anyone identify it from the card, or can I test each output pin and determine this ? our motor control card is a Gecko G251-4

Any help would be greatly appreciated