This vaccum hose is connected to the Y shape steel tube located on the left side of top plenum (driver) and other end is connected to clutch vaccum check valve (L shape and hexagon externally) attached to a fixing plate between brake booster and brake master cylinder.
It should not be cracked or too hard from a long time dried by engine heat.
I can send you a pic to confirm the right hose upon request at alain.nadeau26@videotron.ca
Follow Ups
TT clutch vaccum hose (driver side plenum to check valve) - qcsolo12:17:50 07/31/06