You're talking the window channel pieces, not the inner/outer seals or scrapers, right?
Just did my 'burb. The two piece ones were for the rear. The single piece ran up the back channel. The metal tab is at one end of the piece, right? On mine those went into the top, right by the back fixed window. I think they may go into the set screw that comes down from the top of the door, can't remember for sure. The long single runs were for the front windows. You can do it with the windows in, but you need to loosen the posts so you can slide the windows backwards/forwards enough to install the new rubber in the channel. I took the back fixed windows out so I could access the lock actuators and lock linkage for R&R, but you could probably do it with just undoing the mounts and angling the piece forward enough to free the glass.
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