Taiwan Commate Computer Inc. PV-DDR User Manual page 14

This connector supports the provided floppy disk drive ribbon cable. Orient the
red stripe to pin 1
2.4.7 Primary/Secondary IDE Connector (Two 40-pin IDE)
These connectors support the provided IDE hard disk ribbon cable. Connect
your first IDE hard disk to master mode of the primary channel. If you have
second IDE device to install in your system, connect it as slave mode on the
same channel, and the third and fourth device can be connected on secondary
channel as master and slave mode respectively.
There are three connectors on the 80-pin IDE ribbon cable. The blue connector
must connect with motherboard's IDE connector and the other connectors must
connect with HDD. In order to get the better performance the Ultra DMA
66/100 HDD must connect with 80-pin IDE ribbon cable.