Dell Precision 650 - Manual (Page 56)

Serial ATA Drive
7. Check all connectors to be certain that they are properly cabled and firmly seated.
8. Close the computer cover.
9. Connect your computer and devices to electrical outlets, and turn them on.
See the documentation that came with the drive for instructions on installing any software required for drive operation.
10. If the drive you just installed is the primary drive, insert a bootable floppy disk into drive A.
1 hard-drive cable
2 power cable
1 power cable
2 serial ATA hard-drive cable
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.