After trying to follow a Redwood supplied coax wiring diagram, I realized that my 2014 38GK was not wired like the diagram. A buddy of mine armed with a tone tester and a coax tester spent a good part of the day mapping out most all of the coax runs in my rig.
Not to say yours is wired like mine, but here is what I found. There are 3 marked orange coax cables in the entertainment center. One is a direct run to the convenience center, the 2nd is a direct run to the roof, the 3rd is a direct run to the outside tv.
As I mentioned, we used a standard tone tester and a Kline coax tester (Klein Coax Explorer Plus Tester
Attached is the diagram of my unit.
Hope that helps.....