IBM 520 - Page 294

Connecting External Options
3. Go to Table 7 on page 385 to record the type of external device
that you installed and the location into which it is installed;
then, go to “What to do next?” on page 277 to determine your
next step.
Power Connector
Monitor Connector
Serial Connectors
Parallel Connector
Expansion Slots
SCSI Connector
(Non-Disk-Array Models)
SCSI Connector
(Disk-Array Models)
SCSI Connector
Knockout
Keyboard Connector
Mouse Connector
276 PC Server 520 User's Handbook for PCI/EISA