2.Locate the hard disk drive ribbon cable that came with the computer. It is a flat cable with three connectors: one on each end and one in the middle, as shown below.
connectorconnector
3.Select the connector on the end of the longest part of the cable. Notice the small tab in the middle of the cable connector; align this tab with the notch in the system board connector, as shown below. (The option card connector board and diskette drive ribbon cable are removed from the illustration for clarity.)