This may be a stupid question, but are there supposed to be four total pins in the attached image instead of the three I have? If there are supposed to be four pins, there's no sign of any metal connection left where the missing pin is.

 

and poof it was gone. lol. how many wires go into the plugin. the coil plug hole must be for a different model or yr that has a forth wire.

 

you know you're getting old when you just replaced your coil and can't remember..............

junior is out with the car so if your question has not been sufficiently answered I'll look when he returns

 

There are two wires coming out of the connector with two prongs and one wire coming out of the connector with one prong. Given that and the fact that there is no trace of metal where the missing prong is, I guess it is supposed to be like that. This is a '94 Z28 by the way.