I need advice on how to cascade two Legacy switches. I'm running one 622 with slave and two 508's. My Legacy switch is a 6-4, with WaveFrontier LNBs at 91 (for Bell, with no switch), 110, 119 (and 129 waiting to hook up). I have 61.5 on a separate Dish-300 in order to get Euronews on channel 900. Now I need to add 129 to get FOXAZ on channel 365. I have available two SW-21 and two SW-21X to cascade. Which side of the SW-64 do I use to cascade the switch to 129 satellite?