Sorry, no pinout diagram in the manual. The E55 manual does not yet appear on the Panasonic (UK) website, but as far as I can tell, the very limited info about the Ext2 socket is exactly the same on the downloadable E50 manual and in the printed E55 manual.
There is a Japanese version of the E55 manual. I am not too hot on the translation side of things, but I did not see any pinout pics on the Japanese manual either
