Appreciate this is a very dated reply but your post is the only one I can find on line that is related to my problem. It is simply this - how do you secure the red & green wire to the white plug? I have cut the red & green from a donor car, so the wires have no ends & not sure whether they need a prepped end for the red locking tab to crush. Hope you are still on the forum.Ok that's good, in the boot on the left side behind the boot trim is the rear fuse box (REC) you need to find a big blue plug on the left of the fuse box. If you look on the back of the plug is a White connector labled A1 I think you need to remove this from the plug by releasing the two tabs at each end. When the White bit is out slide out the red locking tab then fit the red wire in pin 1, and the green in pin 4. Refit the red tab and the White connector and refit the plug.
If you get stuck or need pictures of the plug let me know
Oh, you will need to get the park assist ecu programmed to the car with tech 2 for it to work and if your car is model year 07 onwards remember to switch it on via the sid display once it's been programmed to your car.