Hey, so after browsing long posts and some internet reviews I was able to install an Ali Express composite camera in my Fabia MK3 2016
I have amundsen Mib2.
It's all comes to coding with vcds or obdeleven the F5 module to enable rvc. After that, hard reset the head unit by holding the power button. if the camera is not connected the park pilot will appear only once when going in reverse.
Next the camera needs to be connected to the this [layout provided] pins in the blue module, I have improvised pins from a computer fan connector and jammed them into the blue model,
but it can be bought from ali Express
https://a.aliexpress.com/_uJddyd
Additionally I have bought a camera mount for license plate light
https://a.aliexpress.com/_vnQn33
after that I have ran the wiring, the camera can be constantly on or powered from reverse light.
hope it helps some people, because I thought that an rgb converter is a must, and it's not, it's only for adding the guide lines from the can bus.