It seems strange, but the coax is shown on the 12V installation and drawings pages, There's not much but it is there. On my 01 35U and the 08 35J, there is one coax from the dish to the forward overhead compartment. On mine, there is a plate for the elevation sensor and that is where the coax was found. From that compartment there is one going back (in the roof) to the bedroom and lower compartment. This one cannot be used for satellite because, at least on mine, there are splitters. I ran a 2nd RG6 from the satellite dish to the front compartment because I use a DVR with dual tuners and need 2 coax's. What I did was attach 2 new RG'6's to the factory installed coax and used it to pull the new ones in. As for the bedroom, we don't use it but I may run coax from the utility compartment to that TV and use it when we use a tripod.
Also, I ran 2 coax from the front compartment down the wondow post to the front grill. That is where I plug in the tripod if we can't use the roof mounted dish. I have simple antenna switch (Radio Shack) on each COAX that connects the roof or tripod.
Hope this helps a little.
Hickory, NC. 2007 Fleetwood Discovery 40X