Subaru 2004 Legacy - Manual (Page 458)

11-57
2Maintenance and service
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4. Align the claws of the plastic support with the
grooves in the blade rubber assembly, then slide the
blade rubber assembly into place.
Securely lock the end of the plastic support as shown
in the illustration. If the rubber is not retained properly,
the wiper may scratch the rear window glass.
USB586CA USB584BA