THC Installation Step by Step

I think you did a Great job with your project! I have a Razorweld 30 and the z axis ready to hook up to the Proma sd. I looked at your electrical connections to yours. I would like to know how to hook it up to my plasma. You are hook up to the 1:50 connections and the Arc OK from your plasma machine. This is the only part I do not understand for my plasma.
Thank you for any help.