OK, so are you saying your switch is inside? You should have all of the inputs from your dishes coming into the switch. Since you have a Superdish and a separate Dish 500 you should have 4 inputs coming into the switch 110, 119, either 105 or 121, and either 61.5 or 129 depending on your location. Then if you just have the 211 hooked up you should only have 1 output coming out of the switch. So all you need to do is add 1 more line to your other receiver that you want to add. if this is a regular single tuner receiver you don't need anything else. If it is a dual tuner receiver you can still use 1 line, but you need a separator.