TYAN THUNDER K8S Manual page 31

Simply plug in the BLUE END of the IDE cable into the motherboard IDE connector,
and the other end(s) into the drive(s). Each standard IDE cable has three connectors,
two of which are closer together. The BLUE connector that is furthest away from the
other two is the end that connects to the motherboard. The other two connectors are
used to connect to drives.
Note: Always remember to properly set the drive jumpers. If only using one device on
a channel, it must be set as Master for the BIOS to detect it.
TIP: Pin 1 on the IDE cable (usually designated by a colored wire) faces the
drive's power connector.
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