WARNING: This page is about a different car, the 2006 Subaru Outback and 2006 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Lift-up the vehicle.
NOTE:
A plate type lift cannot be used.
Remove the push turn clips (A) and bolts (B), and remove the floor under protector.
Fig 1: Locating Push Turn Clips And Bolts Of Floor Under Protector