Card Retention Cover Mechanism
Part number 3501277,3501327,3501415,3501417,3501660,3501662,3501726,3501728 The card retention cover mechanism is the means by which expansion cards can be installed or removed without the need for tools.
Inside the case is the card retention release lever, which unlocks the card retention cover. The slot covers can then be removed and an expansion card installed.
On the rear of the chassis is the card retention cover lever. After the card retention cover is released, use this lever to fully open or close the cover.