Bbo90

Hello clublexus. My car in question 2007 is220d. So far the car is great no doubt about it very pleased,but long story short.
i've manage to retrofit a mark levinson headunit navigation,but my question is how would i be able to install the back up camera does anybody know wich plugs,wires i have to check and work with.
can someone provide any pictures , wiring diagrams i woult apreciate it.

hope my post won't create any problems.

thank you !!!