On Thu, 24 Apr 2014, g wrote:
http://www.componex-electronics.com/files/BatteryHolderCR2032.jpg
from which i got a firm understanding of mechanics of holder.
next i found another link to a pic of above holder mounted to a pcb that gives better understanding of how tab locates to battery;
http://www.intel.com/support/motherboards/desktop/sb/img/battery_upright.jpg
from this, i how can see how tab is moved in direction of battery + side to allow battery removal.
so, does all this confirm what you found?
Yes. .../battery_upright.jpg depicts precisely the kind of holder I have. For some reason, I never thought to include holder in my search.