Years ago I had a SK-3005 installed on my RV. Two lines ran to a DVR in the front of the RV through the roof and the other runs from the dish to the back of the RV on the roof. The fourth line was never used. All has worked fine for years but now I would like to update my system to a HR-34 and two C-31's. My question is will the new install work as is or do I need to reroute the line going to the back of my RV into the same area as the DVR to tie it into a new switch.