hm. how to explain this..
there's a few different types of switches as well, you dont want to get the wrong one.
ok, how's this.. this is the switch i got at radio shack and it works:

the ones that dont work are the ones where you have to hold down to activate or deactivate.
about the wires.. speaker wire usually 2 wires side by side. red and black most of the time, just mesh one O/D wire and red together and seal it with the heavy tape. do the same for the other, and connect the other ends to the switch.