need help with weird cable

[tomk@pro-sol.cts.com (Tom Kelly)]

 I picked up a ODD cable (adapter) at the Swap Meet.
 It consists of a gray plastic block with three DB connectors mounted on
it,
 { DB-19 (M), DB-19 (F), DB-9 (F) }
 and a nine inch cable ending with a mini-din-8(M) connector.
 The only markings are PA02 (on the front), and Thunderware-Inc (on the
back).
 
 It looks like below:
 
         DB-9(F)
         PA02   ---------> mini-din-8(M)
         DB-19(F)
 
        front view
 
 
 
 
 
     mini-din-8(M) <--------
 
                            Thunderware-Inc
                            DB-19(M)
 
                            rear view
 
 It seems like it might connect to the drive port on a Apple IIc, IIc+,
IIgs
 or a Macintosh, but I can't figure out WHY.
 Can anyone help me figure out this puzzle?
 Thanks

ProLine:  tomk@pro-sol
Internet: tomk@pro-sol.cts.com
UUCP:     crash!pro-sol!tomk