Hey guys, I have Clarion MAX686BT head unit and a CMOS reverse camera fitted in my car. The question is how do I switch automatically to reverse camera display when i switch to reverse gear? I've already connected the camera wire to the tailight and connect the RCA cable to the head unit. Everytime i wanna see whats behind i have to select the 'AUX' tab in the head unit. It's kinda annoying and ineffective imop. Is there any device that will do this job automatically? cheerz