NEC 140He - Manual (Page 265)

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5. Using the provided screws, secure the hard disk drive into the empty drive carrier.
6. Firmly hold the additional hard disk drive and handle, and insert it into the slot.
IMPORTANT:
„ Push the hard disk drive until the handle hook hits the frame.
„ Carefully hold the hard disk drive with both hands.
7. Slowly close the handle.
The handle is locked when a "click" is heard.
NOTE: Make sure that the handle is hooked to the frame when having inserted the hard
disk drive.
8. Close the front door.