Navigation connector help...

[ranorris2]

I just installed factory navigation, I haven't got it unlocked yet and I'm still waiting on VSS harness to come in...

My question is what goes in the third connector spot???

1. black plug
2. purple/pink plug
3. ????
4. brown vss plug...

I just want to make sure I'm not missing something...also just for my knowledge what do the 1st and 2nd plugs do too?

Thanks,
Ryan