'Simply' Window Lift Channel Bracket Install Question

[VFilms]

What is the preferred method of installing the door glass. With the lift channel bracket installed with the rivet in place prior to installing the glass in the door OR installing the bracket and rivet to the glass with the glass in place in the door, which seems to be a PITA.
Thanks

 

[BLK 68 R/T]

Lift bracket on glass prior to install.