As an Everlast user, I would recommend going the route that Toolboy posted in this thread. Pictures of RAW Voltage wiring on Everlast 52I
Hook the wires directly to the back of the lugs on the front of the machine. I used crimp on ring connectors (I think they were 1/2") on the wires. The work clamp lug has a nut you can remove to slide the ring connector on and replace the nut. The torch side has an air line that prevents you from removing the nut, so I cut the ring connector into a horseshoe and slid it behind the nut.