Hi kuwait340,
On
http://www.smartcockpit.com/pdf/plan...320/misc/0005/ you can find a graphic of the overhead panel.
Here (
http://www.simpit.de/a320dim/page_05.htm) are nice pics of the whole flight deck. Unfortunately the quality of the rear C/B panel is not that good.
Maybe it helps you
Is it actually true that the C/B panel on the overhead supports only the devices which still run in EMERG ELEC CONF.
regards
lukas