no...i think your misunderstanding something
the HID's plug into the stock low beam connector, and the high beam connector stays un-plugged, so if you go this route and dont rewire,
you wont have high beams in the sedan headlights, but with HID's you dont really need hi-beams
all HID's need is power and ground to run, since you say the sedans have a positive switch, and the p5's run a ground side switch,
the only real thing we need to do is flip the wires, and plug them in backwards lol