Firemanjim is correct ,there are two types ,normaly closed contacts going open on activation,this is the prefered type and by far the easyest to install , I ordered 2 from the states last year high quality switches ,that were sposed to be the above type , what arrived were the dirt bike / quad types that are normally open and go closed on activation , it was ok for me as I just used a relay to change the open/close sequence and used this relay to shut off fuel and other things so it worked out ok for me
Gary