Have you ever seen someone screw lights to a Trailer?
That's right, they put a self-tapping sheet-metal screw between the 2 twisted wires to hold the Light sets on the metal walls.
BTW, This was not the worst of their hazards or problems. Just before Christmas I was called out to this place after Midnight because they had no Heat or Electricity. The Fire Dept. and POCO had shut them down because they had a Propane leak outside and there was sparking on the Gas line where it passed through the metal skirt below the Trailer.
Another story there, but a Night I won't easily forget.
Bill