NEC EXPRESS5800 LC1400 series User Manual page 113

Attaching the Device Side Rails
9. Install the media device into the bay as follows:
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Move any cables in the bay out of the way.
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Align the rails on the media device with the supports in the bay.
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Slide the device into the bay until it locks in place.
Installing a Removable Media Device
Upgrading Your System 4-33