Do us a favor and tell us what you are working on.
The 95+ NA 3.8L'* had a double vac fitting come off the TB and one goes to the FPR.
The 96-97 SC 3.8L'* had a vacuum line that came off a tree on the supercharger right behind the TB and went to the FPR.
The 98+ SC 3.8L'* had a vacuum line that came off the lower intake manfold as a T. Following the front branch would make it'* first stop as a T at the FPR and then it continued to the boost control soleniod.
00 Regal GS: All kinds of cool stuff.