[SS427]

The third spade is broken off. It would be in the upper right corner of your picture and would be on the opposite end of the metal strip that is riveted to the bakelite.

Because of this you cannot connect it correctly. The black/pink wire should go to that missing terminal end. Where you have it now is actually a locating tab that the two prong connector mounts up against. However, it will still function correctly where you have it.