[Ham-Computers] Identifying Pin 1 on a DB-25 or DE-9 Sub-miniature D Series Connector

[WA5CAB at cs.com]

I know that I once knew this but 20+ years of not needing to know it has 
taken its toll.  I need to make a "breakout box" to gain electrical access to 
the individual wires in a cable that has a male/female pair of DE-9S & DE-9P 
(often erroneously called DB-9) in the middle.  I know that Pin 1 is in the 
longer contact row, but have examined the faces of male and female 
connectors and found no numbers molded in.  

On the DE-9P attached to the stepper motor there appears to be molded into 
the solder cup side of the connector next to one of the end pins in the row 
of five a small round hole filled with black paint.  As of today, I don't 
have the extension cable with the mating DE-9S on it to examine.  Is the black 
hole the Pin #1 indicator?

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480