My FOX mustang door window shattered, so bought another glass from ebay..and DUH..HOW the keck do i put it in?

the bracket on the glass appeared solid, not removable, and the door slot for the glass is NARROWER than the bracket..so HOW the HECK do I put this in? it’s is a T-top glass, which is different than convertible, it’s 1 3/4 taller. cut the metal of the door?? is there somethng of the glass bracket that i don’t see? EMAIL to RMmartin2u@aol.com..I don’t have access to the RMmartin2u@attworld.net that i just got.