For years I have been using a single lnb to set up at tailgates. I recently had a 5 lnb dish intalled on my house, and I was thinking of using the 3 lnb dish at the tailgates now. I have a multi-switch with 4 outputs. It has 18v, roof antena, and 13v. How many wires need to come from the 3 lnb's, and if I only run 1 wire, and use the 4 outputs on the multi-switch, where do I hook up the 1 wire (18v or 13v). We usually run 3, sometimes 4 receivers at the ballgames.