Please provide detailed installation information.
To replace the front and rear bracket of the cutter grid, you will need to remove the cover over the cutter grid. There would be 2 or 3 1/4" hex head screws holding in place. Once cover is removed you will remove the 2 -1/4" screws holding the cutter grid, there is one on each side attaching to the wall. Unplug the wire harness for the cutter grid and pull cutter out. Once out you will need to remove the torx screw holding the wire. There should be 1 on the front and one on the rear. Unstring the wire and take the brackets off and install new. Replace one of the screws for the wire and restring the wire. Reinstall in reverse.