sattlelite

If you're referring to one of the roof mounted dome automatic satellite dishes, the mounting feet get screwed to the roof using an appropriate sealer like Dicor. A layer of Eternabond over them as well would be a good idea though. The wire or wires can be passed through the roof via the fridge vent if that's a convenient location, or they can be run through any one of several weatherproof through the roof fittings. Winegard sells a low cost notched plate in several configurations that's commonly used in many installations. The plate, screws, and notches on that get sealed as well of course.