Here you go: http://ferrarichat.com/forum/showthread.php?t=167604 They get pulled the same as for a 348, but the button is next to the ecus, in rear corners of the engine bay on the '95 355s. The thread I gave you has all the links you will need.
How does that work, Ernie? You push the ecu button back in the engine bay then run up to the cockpit to see the CEL flash?!