Connect AHK E-set?

Hello, friends!


Would like to install my AHK on Wednesday and have developed an original from a donor vehicle, also D2.
The wire harness has several cables, which is probably due to the fact that on the factory side are connected to the right and left rear lights, and on the other hand some are connected.
I am concerned to get no problems with the AC and lamp control devices, connect fog correctly and have continuous increase for consumers in the trailer.

Can someone give me a connection tip or a link to an answer, did not find anything suitable?!

Thank you very much.