Firstly, you have a dish 1000.2 not 100.2. There are many experts who watch all the threads and can probably better answer your question than I. but here goes.
Your 1000.2 with 3 LNBs will pick up 119, 110 and 129. The switch is internal so a single coax cable out of 119 works just fine. It is also the trickiest configuration to align. The odd shape of the dish allows you to pick up all three but at a compromise to signal strength. If you have a dual analog meter, set it up with a second coax lead out of 129. You'll be able to align both 119 and 129 simultaneously and know what each movement does to each satellite signal. 110 will just happen if you get the other two aligned.
If you use that second dish and dedicate it to 129, there is no compromise but you'll need a switch to recognize it all. Either a DPP34 or DPP44 depending on how many tuners your going to.
Those switches, especially the 44 can be $ pricey.
Your 1000.2 simply needs to be pointed properly. I've got a dual meter and even a true non-technical rookie like me, can get it aligned. I know, I do it every saturday in which I tailgate at the game. Good luck!
