Apple PowerBook (2400c) - Manual (Page 51)

Where to add cable terminators when connecting a single SCSI device:
Where to add cable terminators when connecting two or more SCSI devices:
Using your Macintosh PowerBook as a hard disk
You can purchase a cable called the Apple HDI-30 SCSI Disk Adapter that
lets you connect your Macintosh PowerBook to another computer as a hard
disk. The PowerBook internal drive appears on the desktop of the other
computer as a hard disk icon, and you can transfer information between the
computers by dragging files. This feature is called SCSI disk mode.
The Apple HDI-30 SCSI Disk Adapter cable is dark gray, is about 10 inches
long, and has 30 pins.
WARNING Follow the steps for connecting and using SCSI devices
carefully to avoid losing information and damaging your equipment.
SCSI peripheral interface cables HDI-30 SCSI
system cable
Terminator
(If this SCSI device has an
internal terminator, omit
this external terminator.)
Terminator
(If this SCSI device has an internal
terminator, omit this external terminator.)
HDI-30 SCSI system cable
51 Using PC Cards and Additional Equipment