Expansion cards, Expansion-card cage, Expansion cards -15 – Dell OptiPlex NX1 User Manual
Page 107: Expansion-card cage -15, Figure 5-14, Expansion-card cage removal -15, Sdqvlrq&dugv, Sdqvlrq&dug&djh

Removing and Replacing Parts on the Midsize Chassis
5-15
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The computer has a removable expansion-card cage. The expansion-card cage
contains the riser board and any installed expansion cards. Dell recommends
that you remove the expansion-card cage first before removing or installing
expansion cards.
If you are not removing any expansion cards, leave the external cables
attached to them.
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To remove an expansion-card cage, follow these steps:
1.
Rotate the lever toward the back of the computer until it stops in the
upright position.
2. Lift the expansion-card cage up and away from the computer.
To replace an expansion-card cage, keep the cage flush against the chassis to
ensure that the lever engages the notch when the lever is depressed.
lever
expansion-
card cage
notch