In the 2016 Ram 3500 DRW and Big Horn Pkg, I am being told I cannot add the Mopar Backup Camera to the existing 8.4 Screen as could be done last year. This truck has the Chimsel camera for the 5th wheel tow pack but NO factory backup camera. My understanding is that the 2016 models have a minor change that allows you to toggle from either camera from the bottom of the 8.4 screen and it allows both cameras to be displayed in the 8.4 (one at a time) rather than one of the cameras in the rear view mirror like the past few years. I don't want to go with an aftermarket that replaces my rearview mirror because it is too small and I would lose my ASSIST and 911 buttons in the aftermarket mirror as well as the microphones for the Uconnect system. I desperately need some suggestions on how my dealer can add the Mopar backup camera to the 8.4 screen. Thank you!