Dear "6",
Putting up the weather station is part of our set-up procedure. On the tube which is attached to the anemometer is an 8" coupling that fits over the tube attached to the ladder. The device has to be oriented to magnetic North for the wind direction read-out. We also have to align the "lubber line" of the TC to aim the satellite dish.
The receiver instrument is turned on inside (I take out the batteries when stored). In the April,2013 issue of 
www.truckcampermagazine.com I wrote an article on Assateague which shows the weather station as describes its use.