Unplug the machine torch, plug in the hand torch. Connect the work clamp to what you need to cut, start cutting. When the machine torch is plugged in it will only fire from a signal through the rear panel CPC port on the Powermax105. When the hand torch is plugged in it will only fire from its trigger switch. There is no need to unplug the CPC connector from the Powermax when using the hand torch. Jim Colt