Previous owner of my car removed the dash speaker and wiring for it. Anybody know where the speaker wire is supposed to be run? It kind of looks like the dash switches run to a common connector that passes through the sheet metal, but I do not see any evidence of an old speaker wire back there. I am adding 2 speakers in the stock center location and was hoping to follow the path of the original for the new connections. Any other suggestions for routing these wires?