J4se

Hi everyone, Quick question. I'm looking into retrofiting reverse camera into my friends Octavia MK3 2014 with J794 - 5E0 035 864 A, I know it's possible somehow but not sure how exactly. I've spent quite a lot of time at this point just browsing the web and looking for right parts and OEM solutions which doesnt require stupid adapters etc etc. I came to quite a lot of version of camera as well as the harnesses but I'm quite short of many info. I can't find the official wiring diagraam as well as the manuals of the how to dismantle the ineterior parts or the official designated routes for the cabels. I did couple of retrofits mostly on my Audi A4 B9.5 2020 so I'm quite familiar with the whole VW group stupidity of making things harder for everyone. I had to check the correct wiring harness so I wont't be required to buy different cable adapters it was plug code and play. I would like to do it the same way for his car. Can someone suggest maybe the camera with right harness for that unit maybe wiring diagrams on car manuals which would help. I'm open to any suggestions and info anyone can give. Thanks everyone for reply and their time.