This is the 9006 splitter. The single end connects to the OE high beam power source, and the split ends connect to the Bi-xenon solenoid pigtail of the Micro D2S projector and to the my Mini HB high beam LEd projector, or, to the halogen bulb socket if you're retaining it. It could also connect to a second bi-xenon or Bi-LED projector if you to do so. (Remember, if you're going with a second set of bi-xenon projectors, you will have to add a second harness and a second set of ballasts).