― First things first. Before you drill holes and whack out expanded steel with your grinder, as I did, move your gear to a safe location. Or, if you're lazy like me, just use a drop cloth. ∙ Once the drilling and cutting was done, I ran PVC pipe through the holes and inside that some 1/2" flexible tubing to center the wires and to provide some strain relief going in and out. I'm not grounding the feed line, but did insert a heavy duty cut-off switch on the outside wall. ∙ Where the [...].