I want to buy a unlock cable, because they offers me the posibility to change the audio input while watching video also, but thanks fot the idea.

But, I'll guess I have to make my own tv-tuner cable then.

Do you know if it's possible to get some connectors that would fit the tv module and navi, or is my only solution fitting the wires directly to the pins?

I have the pinout for the tv tuner, but I'll need to fint pinout for the navi computer aswell.