Wait a moment, it is a little bit comfusing, but not that complicated. But I didn´t get it as well, before I had one at my hands. 
1st, the Gigafile (PCB or with enclosure - it is both the same) has its own connector, that isn´t any standard connector. Not SCSI not ACSI, it is prepared to be usable everywhere. It has more pins than all the external SCSI cables (26 Pins 3 rows).
You can either solder an own cable for your needs, or take one of the adapters (or the cables inventronic is offering as well). The adapters have that connector which is at the Gigafile itselve at the other side (26 Pins 3 rows), and the desired SCSI (DB 25, ...) at the other side. At all the pictures of the page, the connector for the Gigafile (the 26 Pins) side is missing!
So these small PCBs are needed if you like to use standard cables. I have for example an external SCSI cable form a ZIPDrive, plus an adapter "Type 2a - SCSI external" plus the Gigafile itselve here at my desk.
Ah, and the device is usable only with TERM Power. So no external PSU is needed!
1st, the Gigafile (PCB or with enclosure - it is both the same) has its own connector, that isn´t any standard connector. Not SCSI not ACSI, it is prepared to be usable everywhere. It has more pins than all the external SCSI cables (26 Pins 3 rows).
You can either solder an own cable for your needs, or take one of the adapters (or the cables inventronic is offering as well). The adapters have that connector which is at the Gigafile itselve at the other side (26 Pins 3 rows), and the desired SCSI (DB 25, ...) at the other side. At all the pictures of the page, the connector for the Gigafile (the 26 Pins) side is missing!
So these small PCBs are needed if you like to use standard cables. I have for example an external SCSI cable form a ZIPDrive, plus an adapter "Type 2a - SCSI external" plus the Gigafile itselve here at my desk.
Ah, and the device is usable only with TERM Power. So no external PSU is needed!