on the photo you can see a blank vertical emplacement for the interface needed to connect scsi hd
right, so before buying anything else, you need to locate an expansion card that gives you SCSI I/O... can't help you there. If you do find one, the device I mentioned should plug right in with a SCSI cable.
Sylvain
(et oui, un autre francophone, mais c'est une liste en anglais, alors écrit-moi en privé si tu veux discuter en français)