[mikekilpatrick]

Obtained the front Flir Camera, still looking for a DIY retrofit guide like the E60 had or a parts list from someone who did this.

List So Far:

Night Vision Camera and ECU MUST BE FROM same donor car! REALOEM.com for compatible part numbers and then call recycle yards for parts. You can pay about 10-15 dollars on some sites and they will send out a national request. Much cheaper than EBay.
ECU behind Light switch -12148610680 (retail new) Vin is coded to it
Array of Driver Assistance buttons, incl NiVi on/off, complete set and caps needs to be snapped on within the correct sequence according your car's options
-HSD+2 cable
insert MQS-12 connector
covering cap MQS-12 connector
inserts MQS-12
Water tubing front complete incl NiVi outled
Waterjet NiVi bracket
Screw jet to bracket
Fixing bolt NVE - to have the ecu fixed to the car's bracket.
Snap lock to be installed into the car's bracket (behind the headlight switch).
New airguide with NiVi bracket cut-out
New Front Grills (have to be painted black as they come in silver)
Left 51137203203 $71.69 Right 51137203204 $68.28

Here are steps with pics of cables:

You plug the short black Y cable into it (marked 1 on photo 1). One of the two ends of this splitter Y cable has a plug with two wires (yellow/white and blue/black) going to it (as seen on image 5, the left plug of two alongside). This plug indeed can be cut off and extended with regular wire all the way up to pins 9 and 10 of socket A80*1B on the NV module - which is the black rectangular 12pin socket.

The other connector of this Y cable splitter shall not be cut off. You won't be able to extend it this way, as the signal most likely will be lost to a special design of the cable (despite the electrical connections being good). Instead it must be connected to the NV modules A80*2B black roundish socket with a extension cable terminated with appropriate plugs at both ends. It seems like cable 2 from image 1 would be good for this if it wasn't missing a plug at one end :-( I cant see if cable 3 from image one would be good nor if it has any connectors.

A80*3B is the white socket on the NV module and it outputs the signal to the HU.

So the following statement you made is generally true:

a single wiring harness from the front camera to the ECU. (made of the Y cable and extensions to the ECU)
Build a second harness from the Night vision ECU to the Control unit to turn night vision on and off. (I would rephrase this - From the NV ECU through the Activation module to the ZGW)
Then a third harness from the NV ECU over to the factory NAV head unit.

and the NV power cable.

Images NV_FXX and Night_4 pretty much explain the wiring now when you know which plug on the NV is which.