Waiting in Windsor

 View from the Transit Windsor "Tunnel Bus" stop.

Celebrated St. Patrick's day by taking the "Tunnel Bus" to Windsor and back.  Lucked out again at the People Mover turnstile (put in .75 and got back a handful of change and tokens).  Bought some delicious Canadian candy bars.
The Transit Windsor Tunnel Bus has a stop at the Mariner's Cathedral in Detroit, which is mere steps away from the Ren Cen People Mover stop.  It also stops at the Windsor Greyhound station.  This means that I can take public transportation from my home in Detroit to the Windsor Greyhound station, but there is no public transportation to the Detroit Greyhound station...
I wonder where I can Go Greyhound in Canada?