Thanks for the reply, I've come across both of those links before. The loom I linked to isn't what is supplied by BMW, but a wipac version that supposedly is plug and play, but it clearly isn't. I just don't understand why there are connectors where the spot light wiring should connect, as the spot lights don't come with a matching connection.
The seller has said 'The plugs in the original harness for the loom to plug into are behind the bumper on ether side by the chassis legs apparently'
Which is even more confusing and not helpful!