Dell 2100 User Manual page 102

See Figure 8-1 for an internal view that shows the drives,
control cables, and power cables in the external bays.
power input connectors
diskette drive interface cable
diskette drive
CD-ROM drive
DC power cables
SCSI interface cable
Figure 8-1. External Drive Bay Hardware
8-102 Dell PowerEdge 2100/180 and 2100/200 Systems User's Guide