After looking at everyone's solutions for a larger monitor for the back up camera, I decided to attempt this. A flip down 14" monitor / DVD player installed over dashboard. Back up camera and left / right turn camersa are visible in the monitor running a piggy back RCA cable of the switchbox output and ran up under the trim on the driver's site to the overhead platform. Default view is rear view camera so I can keep an eye on our trailer toad.
I also have a HDMI input on the unit and I plugged in the Dual DMH25 DualCast Wi-Fi USB/HDMI Dongle so I can mirror my phone for Google Maps.
Here's the model I used.
https://www.rockvilleaudio.com/rvd14bgb/
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