WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Locating Vacuum Hose From Vacuum Check Valve
Courtesy of GENERAL MOTORS CORP.
Install vacuum check valve to vacuum hose.
Connect the vacuum hose to the intake manifold.
Connect the vacuum check valve to vacuum brake booster.