73 Duster window sweeps

I need a little help with a situation with the window sweeps I purchased from Year One for my Duster..........I took the window sweeps off my door and in doing so, there is a 'heavy type' bracket (don't know what else to call it) that the window sweep is attached to. My question is.........does the new sweep have to be installed onto the 'heavy type bracket' or is it supposed to just be placed onto the door area as if the bracket is used........Yeahhhhhh
I can't quite figure out how to explain this. Anyway, if there is anyone that has some feedback on this issue, I'd appreciate it.
Thanks in advance,
Greg..........mtn_jake