AGFA 1200 Owner's Manual page 22

If you install the scanner between two other external SCSI devices
1 Disconnect the SCSI cable from one of these two SCSI devices.
2 Connect the free end of this SCSI cable to the scanner.
3 Connect the 50-pin end of the SCSI cable (the one supplied with your scanner) to the other
adjacent SCSI device.
4 Snap the diamond shaped wire clips into the clip brackets to secure the connection.
5 Connect the 25-pin end of the SCSI cable (the one supplied with your scanner) to the scanner.
6 Tighten the connector screws to secure the connection.
7 Make sure that the last device in the chain is terminated.
Chapter 2: Installing the Scanner 22