No, the SCSI
connector is just a strange DEC-only format.  It
looks like a 68-pin SCSI connector, but it's not.  You'll need
the special SCSI cable to use external devices. 
 Only on the M76 and later machines.
 Allison 
 
I don't think the VAXstation 3100/10 is later than a M76, and it's got that
oddball connector.  I thought it was the other way around.  Also either the
DECstation 2100's and/or 3100's used the same cable.
                        Zane