As long as you have only cut into the wires on the wiring harness for the player then there isnt the posibility that you've cut anything in the main loom of the car, you'd most likely be best to call around and explain your situation to a few mechancs or auto elecs and see how many ideas you get then go from there, always pays to no what to look for first otherwise you could waste hours looking for something you have no clue about, let us no how you go
I'd gladly push my holden than drive a bloody ford!