Brother GTX600NB Instruction Manual page 181

(4) Remove the wiper from the maintenance unit by pushing up the latch on the left side of the wiper.
Maintenance unit
Latch
(5) Hold the latch of the new wiper on the left-hand side and insert the new wiper into the maintenance unit from the
right-hand side.
<IMPORTANT>

Replace the wipers of the four locations at the same time.

Make sure that each wiper is installed in the correct direction.

Push the wiper in and make sure that the left and right protrusions are firmly fitted.
Left side
(6) Close the upper left-hand-side cover and top cover.
<NOTE>

Dispose of any waste resulting from the replacement in accordance with applicable laws and ordinances.

Do not reuse the replaced wipers.
<TIPS>

Then, the head cleaning will be performed to prevent any ink from drying up.
Precautions to keep good printing quality/use printer over the long term
Wiper
Right side
Firmly fit them.
6-13
Latch