Hi there mate,
No plug and play solution, but I am currently in the process of knocking up my own looms to make this as OEM as possible (currently running xenons having modified the internals - but this doesn't work with my FLA retrofit - and I would rather they are wired as per BMW's intention).
I've gleaned information from all over the place (annoyingly ~95% of these conversions and wiring diagrams are pre-LCI!), but have been able to construct the following;
(Please correct me if I am wrong on anything - this is my no means concrete information - just what I was able to collate from hours of forum-digging).
Right headlight
1 - Pin 14 FRM (x14260 - 0.75mm" wire)
2 - GROUND (2.5mm" wire)
3 - Pin 38 FRM (x14261) - SAME AS HALOGEN
4 - GROUND - SAME AS HALOGEN
5 - Pin 41 FRM (x14260 - 0.5mm" wire)
6 - UNPOPULATED
7 - Pin 8 FRM (x14260 - 1.5mm" wire)
8 - Pin 51 FRM (x14260) - SAME AS HALOGEN
9 - Pin 32 FRM (x14260) - SAME AS HALOGEN
10 - Pin 28 FRM (x14260) - SAME AS HALOGEN
11 - Pin 30 FRM (x14260) - SAME AS HALOGEN
12 - Pin 40 FRM (x14261) - SAME AS HALOGEN
Left headlight
1 - Pin 41 FRM (x14261 - 0.75mm" wire)
2 - GROUND (2.5mm" wire)
3 - Pin 6 FRM (x14261) - SAME AS HALOGEN
4 - GROUND - SAME AS HALOGEN
5 - Pin 41 FRM (x14260 - 0.5mm" wire)
6 - UNPOPULATED
7 - Pin 50 FRM (x14261 - 1.5mm" wire)
8 - Pin 50 FRM (x14260) - SAME AS HALOGEN
9 - Pin 19 FRM (x14260) - SAME AS HALOGEN
10 - Pin 15 FRM (x14260) - SAME AS HALOGEN
11 - Pin 17 FRM (x14260) - SAME AS HALOGEN
12 - Pin 13 FRM (x14260) - SAME AS HALOGEN
Height Sensor Front
1 - Pin 26 FRM (x14260 - 0.35mm" wire)
2 - EMPTY
3 - EMPTY
4 - Pin 49 FRM (x14260 - 0.35mm" wire)
5 - Pin 31 FRM (x14260 - 0.35mm" wire)
6 - EMPTY
Height Sensor Rear
1 - Pin 27 FRM (x14260 - 0.35mm" wire)
2 - EMPTY
3 - EMPTY
4 - Pin 48 FRM (x14260 - 0.35mm" wire)
5 - Pin 29 FRM (x14260 - 0.35mm" wire)
6 - EMPTY
TLDR;
Angel Eyes
Pin 1 on both headlights needs wiring as per the diagram using 0.75mm2 wire. On a halogen car, these are wired (to a different pin FRM side) using 0.5mm2 wiring - so it might be possible to just swap the pin?
Ground
Needs running to pin 2 on each headlight from the ground connector combs on the chassis close to the headlights either side.
Xenon Shutter
Pin 5 on both headlights need connecting to pin 41 on the FRM connector x14260 with 0.5mm2 wire.
3 Corner LED's
Pin 7 needs connecting as per the diagram using 1.5mm2 wiring.
Level Sensors
(3 wires to each sensor) are wired as per the diagram using 0.35mm2 wiring.
The rest appears to be identical to the halogen wiring - so can be left in situ.
AHL is a different beast however, but do-able. I have the wiring information for that should anyone be interested in fitting adaptive xenons. I was going to do it myself, but non-adaptive are so much easier
Cheers!
Edit: Edited to correct wiring on Pin 6 of both headlights.