There are many cables on that site. It would be a good idea to draw what you want to do so you can see what you need. Simply because I know what comes with a SCSI HP scanner, I would say put that on the end of the chain with the provided terminator. So... you would go:

SCSI card ----> Tape Backup ----> Scanner ----> Terminator

Well, that's how I would do it at least.
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-Rob Riccardelli
80GB 16MB MK2 090000736