WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Installing Hood Insulator Tabs
Courtesy of GENERAL MOTORS CORP.
Align the hood insulator to the hood.
Install the hood insulator tabs into the hood inner panel.
install the push-in retainers to the hood insulator.