WARNING: This page is about a different car, the 2016 Subaru Impreza and 2016 Subaru Crosstrek. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Audio And Navigation System Component Location (1 Of 2)
Courtesy of SUBARU OF AMERICA, INC.
Fig 2: Audio And Navigation System Component Location (2 Of 2)