WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: HVAC System (Auto A/C) Components Location - Engine Compartment (1 Of 2)
Courtesy of SUBARU OF AMERICA, INC.
Fig 2: HVAC System (Auto A/C) Components Location - Engine Compartment (2 Of 2)