Mine is manual so there are two nipples on the thermowax ...the one closest to the firewall is plugged ...does that mean the thermowax is ineffective? ...because I have been having cold idle problems and wondered if I need to route that back to some place to fix the problem

 

Yes.

There should be a coolant circuit flowing throught it.

From the top of the rear iron (under the UIM) to the TB to the BAC to the water pump housing.

 

Awesome! Cold idle problems are over!