[rjm]

At first, I did not know what this plate with two screw on knobs was on the lower part of the wall in the living room. So I investigated, pulling the plate I found one wire blue rubber coated going up the wall and the other black going down the wall. The blue one ends up in the attic suspended on the rafters w/ porcelain hangers. The black goes under the house connected to what appears to be a rod driven into the ground.
A couple of times I have bid to much for something I've wanted only to have buyers remorse or find it going for a lot less later on a different auction. I guess that is life. Live and learn.
Richard