Use any 'port' (coax line from dish), (any) one goes to each tuner you want to drive, if using a multiswitch (for more than 4 tuners) for example to drive 8 tuners, you put all four from the dish into the 4 end of a 4x8 multiswitch, then each of the 8 outs can goto a tuner, as for aiming, use the 101 first, assuming you have your tilt right, the other 2 should fall right in.