I have a basic question. So I went out and got myself an aftermarket ballast conversion kit. I know what needs to be done to hook up the HID's but I'm lost as to how to power up the new ballast. Where do I take the power source from? I originally took the power from the power feed powered up the old bulb but I figured since I* may have had a problem with the old ballast, that wasn't the thing to do. Help!