67 912 Ignition switch problems
 

I just bought this car knowing it has some wiring problems. when it is running and I rev it up, the starter engages and stays on! Well trying to chase the problem at the ignition switch I noticed that the tab in the center that indicates the wire position is missing, so my schematic does me no good. can any one send me a pic or a diagram? mine has 10 contact holes in a circle.