Sindoh M403 - Manual (Page 180)

Maintenance and Troubleshooting
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8
4
Hold the handles of the toner cartridge, align the white tabs of the toner cartridge to the track
(arrow sticker) of the drum cartridge, and then push the toner cartridge into the drum cartridge.
The toner cartridge is properly installed into the drum cartridge when you hear a click.
5
Follow below steps.
A. Hold the handle with your palm facing upward.
B. Align the front hooks (arrow sticker) of the cartridge to the guides (arrow sticker) of the
device.
C. Push the cartridge into the device until you hear a click.