I cut a whole in the bedroom wall, and inserted a piece of 2 inch pvc 
conduit.  ON the outside I used an lb elbow.  This is a 90 bend, but made 
like a junction box.  Point the bend down, and stuff with fiberglass 
insulation, then bolted a hoffman steel outdoor electrical box on the inside 
over the conduit.  Bolkhead so-239 connectors mounted in the box door. Makes 
a nice neat weather sealed installation.
I now have four empty connections just waiting for antennas.