scoobycarsean

hi there got a newage blobeye wrx sti 2003 the speedo has a mind of its own so had it code read turn out to be a speed senser switch got a second one gone to put in cannot get the old one one had to breck it to get it out which i have dune but put the new one in the speedo now does not work this is were i need help there was a small flat bit of metal that i did not put it does this bit of flat metal go in than the switch on top if you no what i mean as i broke the swith upi dont no if this should go back please help thanks