Ricoh Printer Quick Installation Manual page 190

Installing Options
The printer hard disk is to be installed to the position shown in the illustration.
F
Insert the printer hard disk by aligning it with the controller board slot.
Slide it in the direction of the arrow, and then connect it to the connector
on the controller board.
G
Secure the printer hard disk using the supplied screw.
H
When installing other options on the controller board, do not close the
controller board, but go to the steps for installing the option.
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