Bi - Xenon on Facelife 318i

I've got a pair of Bi - Xeon headlight and installed it into my E46. As the xenon light flash when they are installed so I send the car back to BMW and set the code. Finally, they work but all the Bi - Xenon function is not working. Just like I cannot adjust the headlight level in the car and the shutter "eye" of the xenon projector is not working as well. There are 5 scoket need to plug with the bi - xenon headlight but I only got 4 sockets used with my old halogen headlight. The red circle part is the socket that i need to plug but actually it did not come with my 318i. Does anyone know how can I wire it up or does anyone what is that socket use for?