I need help with installing my new projector headlights. I bought them off ebay and have no idea how to install them in the car. They have 1 thin red wire and 1 thin black wire, i figure positive and negative for the angel eyes. But there is also another LARGE wire with a 3 prong plug coming out the back on the opposite end of the headlight from the other wires. There is nowhere to plug this into and before i go cutting and splicing wires, i figured i would ask for help! Somebody, anybody, please help me!

 

i actually just got done taking a set of those out of the car i just bought the wires with the 3 prong plug should go to the stock headlight harness since the new headlights will use 2 bulbs for the high/low beams and that prong plugs in so that you can use the new sockets for the new bulb types