02/2007 X5, swaped seats but...

[840i]

Got seats from a 2008 X5 in the 2007 one, but the plugs are different, at least there is a small yellow one with a few pins (not the large usual one) that plugs to nothing > this is on the passenger side.

On the driver side, there is a small black one, and the same yellow one, again can't be plugged in.

I suspect those plugs are for the headrest airbag system, which was introduced in 09/2007 on the X5 is if my information is correct.

The X5 in question was built in 02/2007.

Would anyone know for sure, because as a consequence the airbag light is up now. I cleared it, but comes back straight up. Complaining about the mat sensor on the passenger side and another error I can't remember.

Anyone?

Thank you