Oki C 9400 - Manual (Page 314)

9. Carefully remove the tape.
10. Hold the cartridge in a vertical position and lower the port end into the image drum,
sliding the port onto the tube on the drum.
Port
Tube
11. Press the cartridge toward the tube, then lower the opposite end, aligning the white tab
on the toner cartridge with the groove in the drum. Push the toner cartridge lock lever to
the left (toward the open cover) as far as it will go.
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