Originally posted by: corkyg
There are two connectors.  One is USB and the other is a female Centronics.  It looks too small to be SCSI.  I have a cable with a small Centronics male on one end and a DB-25 male on the other end.  I can't remember what it was for. But, I think it was for a printer connection way back when.  I will take a picture and add it to this via edit.   OK - here is the picture:
Pic 
I think the one in the middle would mate with your Zip female connector. 
OK - further investigation says it is a SCSI - Centroniucs to DB 25.  That is the cable I have.
SCSI 
Can you give us a width measurement of that connector?