Adaptec SCSI CARD 29320A Guide D'installation page 12

2
Connect the other end of the cable to a SCSI connector on the
back of an external device. If you are installing only one
external device, terminate the device and skip to Step 4.
3
Connect the other external SCSI devices by linking each device
to the previous one, as shown below. Terminate only the device
at the end of the chain.
4
Connect power cables to all external device(s) and to the
computer.
SCSI terminator
9