Please, take a time to read posts on this forum, and on
Sadoun's web site, in
Installation Help section, about installing a motorized dish.
You should aim your dish and motor at True South. Then, with your receiver, you can navigate to any satellite within available range, not only to the true south sat. That one is only for reference, because it's location is closest to the center of the curve, making the error minimal.
So, after navigating to these satellites with USALS, which your receiver is probably featuring, you just scan for channels, and watch TV!
Good luck!