Here is a training video produced by DirecTV:
http://www.solidsignal.com/satellite/at9_install_videos.asp
They used an AT9 but the procedure is the same for the AU9 Slimline
http://www.solidsignal.com/satellite/at9_install_videos.asp
They used an AT9 but the procedure is the same for the AU9 Slimline