Dell OptiPlex GX280 - Manual (Page 251)

Drive Interface Connectors
IDE Drive
Connector
Serial ATA Connector
1 colored stripe on IDE cable
2 interface cable connector
3 interface connector
Most interface connectors are keyed for correct insertion; that is, a notch or a missing pin on one connector matches a tab or
a filled-in hole on the other connector. Keyed connectors ensure that the pin-1 wire in the cable (indicated by the colored
stripe along one edge of the IDE cable—serial ATA cables do not use a colored stripe) goes to the pin-1 end of the connector.
The pin-1 end of a connector on a board or a card is usually indicated by a silk-screened "1" printed directly on the board or
card.
NOTICE: When you connect an IDE interface cable, do not place the colored stripe away from pin 1 of the connector.
Reversing the cable prevents the drive from operating and could damage the controller, the drive, or both.
Power Cable Connector
1 power cable
2 power input connector
Connecting and Disconnecting Drive Cables
When removing an IDE drive data cable, grasp the colored pull tab and pull until the connector detaches.
When connecting and disconnecting a serial ATA data cable, hold the cable by the black connector at each end.
Like IDE connectors, the serial ATA interface connectors are keyed for correct insertion; that is, a notch or a missing pin on
one connector matches a tab or a filled-in hole on the other connector.