year make and model ,and engine size please ,and Ill send you a wiring diagram ,also an explanation where the other 2 wires goes: all cars are different there is no set place for the other 2 wires.
In addition ,you had no radio noise before when you reved the car and now you do ,in all my experiences that noise omits from the rectifier bridge and the diodes (stuff in the alternator), usually when they go bad that occurs ,you may also find excessive AC voltage aswell ,if you took a Multimeter and hooked it up to the batt ,you may find 1-5 volts AC voltage ,meaning Diodes on the bridge are bad.
New alt may be in order.
A piece of advice........ you install a "used " alt ,then another ect.... nothing but problems since , why not just buy a decent rebuilt/almost new alt and be done with the headache?