Apple Setting Up Your Power Macintosh G4 (PCI & AGP) - Manual (Page 44)

44 Chapter 2
m If you’re installing a 1.0-inch or 1.6-inch SCSI drive to the carrier in drive position 1 or
2, attach the underside of the drive to the carrier (as shown below).
Attach additional SCSI drives (1" or 1.6" high) to the two flat drive
carriers by screwing them into position from the bottom.
Position the hard disk drive on the drive carrier so that the ribbon cable
connector and the power cord connector are accessible. Screw the drive
into position with the four screws supplied with the drive.