I don't know if your manufacturer has the location for a sat. antenna prewired and marked on your roof or not. My last two Winnebago mfg. units were marked and prewired. Other than that, you may need to find out from the builder where to install the antenna. Have you thought of contacting a professional installer? If you buy from some of them they will give youo a deal on instalation and wiring. By the way be sure to get the meter installed that tells you the angle your dish is at. With that meter and a compass all you then need is your zip code and some patience. It gets easier after you get used to it.
2004 Itasca Sunrise 36', Workhorse
2003 Suzuki XL7