IBM 1 U Installation Manual page 17

7.
Install the drive in the enclosure:
a.
Connect the SCSI signal cable that comes with the drive to the SCSI
connector on the inside of the enclosure.
b.
Slide the filler tray out of the enclosure; then, remove the drive rails from
the filler tray.
c.
Attach the rails to the sides of the drive. The rails are marked "R" for
Right and "L" for Left.
d.
Slide the drive and rail assembly into the enclosure.
e.
Connect the power, ID, and SCSI signal cables to the rear of the drive.
Chapter 2. Installing the tape enclosure
SCSI
Power
SCSI ID
9