Vinny, if you go back to post 23 you'll see the picture of the connector assembly I used to get from the airbag connector to heater controller.
These are all BMW parts. You buy the green 4 way male plug and that fits onto the black socket on the controller.
Then the pins / sockets come pre-crimped on lengths of wire that you cut / solder together as required. You have to open up the 6 way air bag connector and insert the new pins into it, then close it back up.
You'll also need two more wire sockets to go into the connector on the back of the SZL to bring in your 12v supply.
I'll try to dig out the part numbers.
They are MQS pins / sockets as below: (they come with wire attached). I used 0.75sqmm throughout which is plenty, items 1(socket) or 3(pin)
http://www.realoem.com/bmw/enUS/show...diagId=61_3461
Then this 4 pin male plug body will go onto the black socket on the heater controller:
http://www.realoem.com/bmw/enUS/show...diagId=61_4028