Coil pack question, 4 pins but 3 plugs?

[PeterB]

Was trying to find out why my 182 is mis-firing today,

On the coil pack there are 4 pins, but in the plug that attaches to this there are only 3 connectors, it looks like there is space for a 4th but theres no wire or or connector, is this normal?

 

[Fred@BTM]

normal

 

[PeterB]

Cheers Fred, much appreciated. Just wanted to rule that out