I found more photos at this site:
forums.trossenrobotics.com/showthread.php?4110-Re-Looking-for-a-better-IP-camera-Cisco-Wireless-N-Internet-Home-Monitoring-Camera-WVC80N/page3
The writer explained how he opened the case
unfortunately, the antenna connection is not visible - may be on the circuit board within the shield can, radiating through the board ... WAIT, I wonder if that rectangle near the corner diagonally opposite the two pushbuttons ... looks like a possible socket, and maybe the trace leading to IP1 (or is it TP1) may be the radiating element?
If anyone knows, please advise!
Oh, BTW, also another site discusses prying the case open:
http://www.microfrost.com/tag/dcs-930l/
that author converted a 930L to IR; he also experimented with wide-angle adapter lenses.