03 Escalade door window glass install

I have an 03 escalade, non ESV/EXT. Passenger front window got busted out a couple of weeks ago. I bought a replacement window from cardoorglass.com and noticed there is no brackets on the glass to mount the window.

I have yet to take the panel off the door to check it out, but everyone I am talking to says there should be brackets on the glass...

Am I missing a bracket? Do I reuse the old bracket? Is it glued/epoxy...

Is there some sort of pic or diagram of the passanger door..?

I just need to know if I should spend the rediculous amount of money at the dealer.....