WARNING: This page is about a different car, the 2001 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Install in the reverse order of removal.
CAUTION:
Do not install top side of valve down.
Before installing bracket on body, securely fit concave part of bracket to hole in body.
Fig 1: Securing Concave Part Of Bracket To Hole In Body