Attach the Molex power cable to the drive. Unlike the floppy drive power plug, these Molex connectors can only fit into the drive one way, so relax, you can't make a mistake here.
Attach the Primary IDE cable to the drive (for any recent motherboard,
this should be a 80 wire UDMA cable). It will be keyed to only fit in one
way, but to make sure, the red or blue on the cable should be facing the hard-drive power cable.
Attach the long end of the cable to the IDE 0 connector on the motherboard
first, then if there are other drives attach those IDE cables to the IDE 1
connector. PCSTATSSerial ATA drives are still fairly new, so we will only cover them briefly.