NEC S2900 User Manual page 111

7. Strongly push the ejector (the part indicated by the arrow in the figure) until the adapter is
seated properly, and secure the ejector with the screw.
When inserting the adapter into the disk enclosure, push it as far as it will go and then
secure it with the screws.
Incorrect insertion may cause a malfunction.
8. Connect the cables removed in step (1) to the mating connectors as before.
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