HP Vectra VEi7 Supplementary Manual page 53

5 Holding the hard drive in your hand with the four screw holes facing
outwards, reach into the expansion bay and fit the data and power
connectors to the hard drive. You must use the end (black) Master
data connector.
6 Place the four screw holes on the hard drive against the matching
screw holes on the base of the PC.
7 Attach the four screws.
8 Replace any device you previously removed from the upper
expansion bay and reattach all connectors. You must use the middle
(white) Slave connector to this device.
2 How to Install and Upgrade Accessories In Your PC
Upgrading Mass Storage Devices
53