I have a Jayco Fifth wheel. Just recently bought a King Satellite and have a direct tv standard box. I have everything working fine on the inside of the RV. I have a outlet on the outside of the RV...
Not sure where you mean you have a cable outlet on the outside of the Jayco. I had one in the storage area but the one on the rear outside was for cable or Satellite in, not out. If it is for an outside TV then you would need to move your receiver out there to see direct TV, that connection is back to the antenna.