Identifying 2.0T FSI Turbo Oil Feed/Return Lines *Oil Leak*

[iKhmaiFoSho]

Hey, I'm new to the Turbo game and VW/Audi in general as I always owned and tinkled with Japanese vehicles. I have a real appreciation of German engineering and wanted give one a try. I recently picked up a 2006 A3 2.0T FSI Sportsback which also share the same motor as the GTI (BPY Engine Code). Well I notice a slight oil leak from underneath coming from the turbo and i just wanted to verify the oil lines so i can purchase the correct gasket and to understand more of the functionality of my car. I numbered the lines so it will be easy to identify, here is my guess.....

1. Turbo Oil Return Line
2. ???
3. Turbo Oil Feed Line

[RoadRage]

coolant

[iKhmaiFoSho]

coolant

So #2 is coolant return or feed? also where do you think the oil leak is coming from the oil return or feed line?