My wife decided to buy raxiom headlights for our 2012 mustang V6. I went to put them in and the wire harness from the car has 3 prongs but the harness from the lights have 4 prongs. I contacted American Muscle and they said they won't exchange them since I already started to instal them. Can anyone tell me if it's possible to properly splice the wires to make them work? I hope we didn't just throw away $300.