[Richard]

Here are a few things I did when installing roof satellite systems. I used the existing penetration for the old system. It’s a little work to clean up the old sealant but why put one more hole in the roof. I also used the existing tie down points for the cabling, but replaced the tie wraps because the UV had killed the old ones.

If your setup is like mine, you will have to pull the ceiling carpet loose in the passenger upper compartment to access where the cabling makes the penetration. 3M spray adhesive works great for putting it back in place.