Every model and floor plan (layout) is different, so some creativity is required. I'm guessing your roof antenna coax and maybe satellite coax come in there, but where do they come from? And what is in between where they are now and where you want them? Chances are there is a molding along the ceiling above the slide, so maybe that could be removed and extension cables run behind it?
Will you be moving the video switch, DVD, satellite receiver, etc. as well? Tell us more about what you are tring to do. And maybe a photo to illustrate what you have.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL