Mazda 2013 CX-9 Owner's Manual page 498

4. Remove the metal stiffeners from each
blade rubber and install them in the
new blade.
CAUTION
Don't bend or discard the stiffeners.
You need to use them again.
5. Carefully insert the new blade rubber.
Then install the blade assembly in the
reverse order of removal.
Maintenance and Care
Owner Maintenance
8-31