Oki C 9400 - Manual (Page 409)

8. Lower the printer onto the HCF (or HCF/Auxiliary Tray), lowering the holes/plug in the
bottom of the printer onto the pins/connector on the HCF (or HCF/Auxiliary Tray).
9. Reattach the interface cable.
10. Open the top cover and reinstall the image drums/toner cartridges, then close the cover.
11. Plug the power cord in and turn the printer on.
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