I seem to recall some 4A speakerphone connections have something to do with violet leads, and I currently have a key panel phone with built in Type 3 speakerphone that required some extra wiring although I am not sure where those extra wires went off the top of my head. I think it was some connections between the Model 55 control unit and a 66-block.? But could anything like this interfere with what I am trying to do?

Bill