So I found my old doorbell and there are two sets of wires coming to where it was. I say where it was because the current one was a battery wireless. But the old door bell wires are there, two set of wires coming through the drywall. There is no power outlet here. So my question is would they have put the old doorbell transformer or power connection in the attic or run it some place else? The house was built in 1996.