Compaq Evo D510 MT Hardware Reference Manual page 16

Hardware Reference Guide
4. Disconnect all power and data cables from the drives in the
5.25-inch drive bays.
5. To release the drives from the 5.25-inch drive bay, press the short
yellow drivelock 1 as shown.
Activating the Drivelocks (Shown from the Rear of the Chassis)
6. While pressing the drivelock, pull the drives out of the drive bay.
Product Features
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