Installation Position Of Locking Collar/Synchronizer Hub For 1ST And 2ND Gear
WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Installation Position Of 1St And 2Nd Gear Locking Collar/Synchro-Hub
Courtesy of AUDI OF AMERICA, LLC
The identification groove -arrow 1- and thin collar -arrow 2- of synchronizer hub point to 1st gear.