Brother GTX-4 Instruction Manual page 278

(27) Open the cartridge's lid.
<IMPORTANT>

When opening the lid, be sure not to touch portion (a). Otherwise, it could be damaged.

Place the entire cartridge on a flat surface, push the latches on the bottom surface of the cartridge downward and open the
lid.
Cartridge
(a)
(28) Take out the capping pouch from the cartridge, and put the white ink pouch in place.
Push the tip end of the ink pouch into the cartridge until it clicks into place.
Straighten the ink pouch in such a manner that it will be aligned with the gutter of the lid of cartridge, and mount in position by
pulling it with your hand.
<NOTE>

If the edge of the ink pouch is bent or undulating significantly, make it straight with your hand.
White ink pouch
(29) Put the white ink pouch in its correct position and close the lid.
<CAUTION>

Avoid touching portion (a) of the cartridge. Otherwise, you may cut your hand.
Lid
Cartridge
(a)
Align lines with
each other
278
Latch
Place the pouch in straight alignment with the cartridge
Troubleshooting
Lid
X0042
Stretch
X0049
X0041