C2G/Cables to Go 15692 SCSI-3 Internal 68F to External MD68F Adapter with Bracket (Silver) Add an external Micro-Density 68 port from an internal SCSI-3 68-pin cable connection. With the internal 68-pin female to external HD68 female adapter, extending your SCSI bus from inside your tower to your external SCSI peripherals is a snap.