There are 5 ports on your video processing module. one to send image to radio, one for rear cam, one for bed view, and 2 for trailer. trailer buttons can only be pressed if a trailer is plugged in. so you could use those ports but you would need to trick truck into thinking a trailer is there. You could use bed view port to put a front cam on if you didnt care about having bedview cam. then you could push bed button to see front view. you need to buy 10 port module to do what i did. thanks!