Hi Pete.
Yeah, that cable is for a SCSI (pronounced scuzzy) interface, which is the only way of using this scanner IIRC.
The easiest way of using one of these is to buy old components and build an old-spec PC, or buy an existing one and wipe it. Something Pentium 3-ish with a load of memory and Windows XP would work quite well. Then you will need a SCSI card, there are loads of these on ePrey for £10 upwards. As for the software, you should be able to find it with a bit of searching!
It might be possible to find a SCSI adaptor that would work with your laptop, however the software will only work on Windows versions up to 8.1.