Dish 1 and Dish 2 are the 2 cables that run from the roof to the tv cabinet. They are there for connecting your roof mounted satellite antenna. Look on your roof and you will see a sticker that says that is where the roof mounted antenna goes. The other ends of those two cables will be under the sticker, at least they were when I installed my Winegard Trav'ler this spring. Dish 1 will attach directly to your receiver for the living room tv. Dish 2 would couple to your bedroom cable if you put a second receiver back there.
I think the sticker will tell you drill an inch and a half hole, which was what I did and they were right there. Also, that area is reinforced to handle the weight of the satellite dish. Let me know if you need more information.