Dell Precision 410 Service Manual page 95

retaining
tabs (2)
bracket
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When you replace the 3.5-inch diskette drive on the bracket, be sure that the
two retaining tabs on the left side of the bracket engage the mounting holes in
the side of the 3.5-inch diskette drive.
Removing and Replacing Parts on the Mini Tower Chassis
hook
drive release
lever
diskette
drive
5-13