Hello

I have been doing a lot of searching this afternoon as I want to hook up a rear camera from my camper trailer to the standard hi line audio screen. My problem is I can't seem to find any affirmative information on how this is done. I have learned about the secret button using the valet button, so that video input must be somewhere. what i really want to know is where is the auxiliary input located? I did read somewhere that the main control unit is remote mounted. Is this correct?

If anyone could point me in the right direction it would be greatly appreciated?

Thanks Ben