Take a couple photos of the cables and switchbox, etc.. Without knowing exactly what you have, its difficult to provide any feedback..
On my 1999 Southwind, I ripped all the old stuff out and replaced the old TVs with two flat screens. (first diagram)
This year, I rearranged and simplified everything and added two Orby satellite receivers. (second diagram)
Orby Satellite TV – 1999 Southwind 35S