Location of Aftermarket XM antenna

Okay so I am bidding on a Receiver unit for
my system on ebay it comes with a Terk
External antenna.

MY question is where should I mount said
antenna. I went to crutchfield.com and they
mentioned mounting to the back window.

But I also don't want to not be able to stow
my back window. How can I put it up if I have
an antenna on it?

What does everyone else do with their
aftermarket antennas?

Thanks guys!

Not sure what this antenna looks like,,,

I have my sony Magnet mount stuck to the rear center of roof.....the wire goesw under cladding and in through brake light grommet.......

ygmn's location is the most obscure and you won't really be able to see it at all. It will not interfere with your window. You may also mount the antenna in the front, right in the middle of the roof just up from the windshield then run the wire along the windshiled molding and down.

Mine is mounted like ygmn's. Here is a pic: