I think you posted this a day or two ago on another thread?
The one I bought has all connections to be done behind the radio too, and it's supposed to be a genuine OEM. Is the coding part any different for the Highline cameras to get dynamic lines working? Can you send link to the one you bought?
www.t6forum.com
I think you need to give a bit more information as to what you want to do, which maybe why you didn't get much response.
Do you just want to put a cheaper aftermarket kit in with an independent screen?
Do you want a fully OEM spec system?
Do you have a camera capable head unit already or would you consider changing to an aftermarket one that was?