Subaru 2012 Forester Owner's Manual page 464

11-42
Maintenance and service
2. Pull the blade rubber assembly out of
the plastic support.
1) Metal spines
3. If the new blade rubber is not provided
with two metal spines, remove the metal
spines from the old blade rubber and
install them in the new blade rubber.
4. Align the claws of the plastic support
with the grooves in the blade rubber
assembly, then slide the blade rubber
assembly into place.
5. Securely retain both ends of the
rubber with the stoppers on the plastic
support ends. If the rubber is not retained
properly, the wiper may scratch the rear
window glass.