So I have a 1" copper line that's the main water source coming into the house through the garage. The first tee off is to this 1/2" house bib. I'm getting ready to redo the previous water supply project by the former owner and I'm transitioning to pex. Herein lies the problem, I know some older homes used to attach a ground to water lines. I didn't think that was the case here (although house is pre 1970) but I'm confused as to what I'm actually looking at. It's a stucco exterior siding (black paper, wiring, mesh, stucco). Thoughts on what this metal attachment and wiring is??