I currently have the Slimline dish up on my roof. It has two coax connections coming down the side of my house and to a grounding station, where the two wires then enter the house at separate places. My question is, if I want to wire up a third room, where does the connection originate? Does it come from up inside the arm of the slimline, underneath the LNBs? Do I need to take the arm apart and that's where the multi-switch is? I am just not sure ... Anyone have that knowledge they could share with me? Thanks!