2001 S60 2.4 Turbo

I have attached a picture of a connector which is missing a hose or line. Picture is taken rear view of the engine from the firewall. Connector is located on passenger side/rear of engine.

Please help me identify missing part and where/what the other end connects to.

Thanks everybody!

 

Nothing missing. That's the drain for the cooling system to drain the block.

 

Thank you. Back to the drawing board. I thought I found a possible vacuum leak for Code P1171.