Dell OptiPlex 740 - Manual (Page 52)

Connecting and Disconnecting Drive Cables
When connecting and disconnecting a SATA data cable, hold the cable by the black connector at each end.
Optical Drive
Removing an Optical Drive
1. Follow the procedures in Before You Begin.
2. Remove the computer cover (see Removing the Computer Cover).
3. Pull up on the drive release latch and slide the drive towards the back of the computer. Then lift up to remove the drive from the computer.
Serial ATA Power Connector
1 power cable 2 power input connector
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the computer cover.
NOTICE: Do not pull the drive out of the computer by the drive cables. Doing so may cause damage to cables and the cable connectors.