If you will have two hard disk drives in your system, perform the procedures in steps 6 and 7 again. This time, however, connect the connector at the end of the ribbon cable to the horizontally mounted hard disk drive you just installed. (If necessary, turn the subassembly upside down to make it easier to connect the cable.)
8.Looking at the subassembly, locate one of the power supply cables that lead from the power supply (behind the horizontal drive bays). The cables are labeled P1, P2, or P3 and have a clear plastic connector on one end. You can use any of the three cables. As shown below, the end of the connector has two notched comers.
The power supply socket on the back of the drive is next to the ribbon cable connector. The socket also has two notched comers, as shown below.
power supply cable | power supply socket |
notched corners
You must connect a power supply cable to each drive you install in your system. If you removed a hard disk drive from the vertical mounting position, connect the power supply cable to this drive first. If you did not remove a hard disk drive, connect the power supply cable to the drive you just installed in the lower horizontal drive bay.