Looks like you have a SCSI scanner.
In order to use it you will need a SCSI card.
But
-found on web
Please note this driver will NOT make the device function when the problem is down to motherboard compatibility. The scantak 2c will only work with its scussi interface when plugged into an AT board. Newer ATX boards result in a system lockup with the adapter and this driver will not make the problem dissapear.
You MAY be able to use another SCSI card and get it to work.
A rough guess it is a 25 pin connection (looks like a printer female connection) or an amphenol connection, older SCSI cards cheap enough, get a used one see if it works.
Diff SCSI connections
