If you don't have an outside port marked "satellite" you may need to run a separate coax from the outside to a wall outlet on the inside. According to some of the others that have had only a "cable" port the solution was to change the splitter to one that is a different frequency. It MAY be located behind the wall outlet in the trailer. The splitter that they installed was purchased from Home Depot of $4. It is a "Ideal" splitter model #85-132, 5mhz to 2.3ghz. If you do a search on the forum you may find the thread that discussed it. The problem with the "cable" port is that it will not pass the 12V needed to power the antenna. You should also turn off the antenna amplifier.
The TT I have has two outside ports, one for cable and the other for satellite and two inside wall outlets, one for satellite and the other for cable/OTA television.
I can't remember if I saw the discussion on this forum or a different one so do a few searches (on the menu bar at the top of the page) and maybe you can find the solution.
One other method is purchase a "flat" coax jumper, you can get them on Amazon for about $4 + shipping or Walmart.com for about $2 and if shipped to pick up at the store there is no shipping charge. That will allow you to close a door or window with the coax passed through. That is the quick easy way to solve the problem
2014 Palomino Puma 25RS
2011 F-150 Super Crew XLT
Days camped in 2014 - 23
Camped 2015 - 47
Camped 2016 - 51 done - 6 more planned so far