July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Installation Procedure

Align the center pillar auxiliary weatherstrip top push-in retainers to the top hole in the center pillar.
Install the center pillar auxiliary weatherstrip working downward pressing in the remainder of the push-in retainers until fully seated.

Fig 1: Locating Roof Rail Auxiliary Weatherstrip Push-In Retainers
Courtesy of GENERAL MOTORS CORP.