The accelerator does have a 50 pin scsi controller on it. In fact, the scsi controller is an NCR scsi controller. On the bottom left of the picture there is an NCR 9420n chip that's the scsi controller. It has a SCSI symbol on it as well.
You would need to find the driver for this scsi controller to get it to work, but it's a standard scsi chip that was used in many 8bit ISA scsi controller. I remember that chip quite well.
