Dell OptiPlex 755 - Manual (Page 57)

Power Cable Connectors
Connecting and Disconnecting Drive Cables
When removing a cable with a pull-tab, grasp the colored pull-tab and pull until the connector detaches.
When connecting and disconnecting a cable without a pull tab, hold the cable by the black connector at each end.
Drive Inserts
Your computer will come with a plastic insert with shoulder screws and a metal insert.
Removing Drive Inserts
If you are installing a new drive:
1. Follow the procedures in Before You Begin .
2. Remove the computer cover (see Removing the Computer Cover ).
3. Lift the drive release latch.
4. Slide the metal bracket toward the back of the computer and lift up.
1 data interface cable connector
2 data interface connector
1 power cable
2 power input connector