There is a cover on the right side of the chassis. Behind it, the SCSI backplane, auxillary fan, and line supply connections can be accessed.

4 screws secure the cover

This guide post holds the cover in place when the screws have been removed

The cover has a tab at the top. Slide it out and down to remove it.

With the cover removed

This screw holds the auxillary fan in place. The fan power connector plugs into the SCSI backplane.

These screws hold the line supply connections in place. These connect to the system backplane and mains circuit breaker

These screws hold in the SCSI backplane. Remove the SCSI bus connections and power connector and hold them out of the way when removing the SCSI backplane. Remove SCSI devices before removing the backplane.