Abit AN8 SLI User Manual page 33

Hardware Setup 2-21
Each of the IDE port connects up to two IDE drives at
Ultra ATA/100 mode by one 40-pin, 80-conductor, and
3-connector Ultra ATA/66 ribbon cables.
Connect the single end (blue connector) at the longer
length of ribbon cable to the IDE port of this board, the
other two ends (gray and black connector) at the shorter
length of the ribbon cable to the connectors of your hard
drives.
NOTE: Make sure to configure the "Master" and "Slave" relation before connecting two drives by one
single ribbon cable. The red line on the ribbon cable must be aligned with pin-1 on both the IDE port and
the hard-drive connector.
User's Manual