IT WORKS!!!
So it is NOT part #68200274-AA. That part number is a six pin plug/wiring harness and everything on the back of the truck is eight pins.
https://flic.kr/p/AqjWcmNot it! That is the 10 foot extension that is intended to run to the back of a chassis model however, I believe the reason it is only six pins is because it doesn't need the additional wires for the locking tailgate.
So you need the entire OEM wiring harness which is part #68189124-AB and #68224929-AA. One connects to the truck bed (after you have removed the tailgate) and then the other completes the connection to the camera (which is normally INSIDE the tailgate). Don't ask why they needed to make this harness in to two pieces. Don't think that was necessary but that's what made it work.
https://flic.kr/p/AqjWcmI labeled the harnesses with letters so it's easier to show them to you. A and C comes together as 68224929-AA. You discard C as you don't need it for anything (except maybe spare parts). B is normally the part that is inside your tailgate. I have already installed the camera (part number 56038978-A3) at the end of harness B.
I plugged everything in and I have confirmed rear camera image on my in dash display. Yay! So now all I have to do is strip off the unnecessary wire harness which is for the power lock on the tail gate, fashion a mount for the outside of my camper, duplicating the height and angle of the existing camera, hide all the ugly wires in a conduit of some sort, and it will be beer time!