Just got back home after my wife's surgery and have completed extending my camera cables so I could swap the trailer plug with the video cable connectors from the bumper to the bed. It was a success and am very happy with the results and hope this helps everyone that tows a goose neck or fifth wheel.
I purchased the cables from PASTERNACK (www.pasternack.com) 866-727-8376, Sales Person was Derek Burkett with the following part numbers. The last two digits are the length. I ordered 36" which worked great, but some folks may want to order another 12". The total cost including taxes and shipping was less than $100.
a. Rear view camera cable (black) PE3W08444-36, description. Black FAKRA Jack to FAKRA Plug Cable Using LMR-100 Coax.
b. Inside camera cable (Water Blue which is a universal cable to connect to the Orange cable) PE3C2779-36, description. Water Blue FAKRA Jack to FAKRA Plug Cable Using LMR-100 Coax.
To install you will need to remove the bumper plug and the bed plug. The plugs have a metal squeeze clip that you need to press from the backside, the bumper can be accessed from behind the bumper and bed plug will require you to remove the rear taillight to access the rear of the bed plug. Your owners manual explains on how to remove the rear taillights. On the bumper plug video cables you will need to slide the red clips back and then push down on the release tab to release the jack from the plug. Next on the 7 pin connector you will slide the light grey clip back and then push down on the release tab to release the 7 pin connector (I found it easier to completely remove the grey clip due to access).
I installed the bed plug first which will require you to remove some of the spray-on bed liner and make adjustments to the metal squeeze clips to accommodate the Pyle National Plug and the thicker bed wall. It makes it easier to do a test fit before applying cables. I spent many hours searching and calling, but I couldn't find anyone that would supply waterproof connectors, so you will need to tape these up to keep out moisture.
The pictures will tell the story and I did finish up by using cable ties to secure the cables to the 7 pin cable harness from the bed plug to the bumper plug.