Are you able post a picture of the 'metal thingy' you talking about Sandro? 

You can see a series of metal thingys under the switch stacks and towards the back. befind the metal thingy is a small coil which when enrgised pulls the THING in and the stack drops. getting back to the original quextion, I am guessing the switches are in their normally open/closed state when the stack is UP?