Help figuring out what this tube goes to.. Oil catch can?

[SilviaT]

FIRST OFF, i pulled my engine about 6 months ago because i had a compression loss which resulted in a chip in my 4th piston so i had a full rebuilt/ inspection. Forged CP pistons and slight upgraded internals with name brand parts, the rest is OEM. Now im slowly but surely putting everything back to where it went originally as clean and healthy as possible. This is one of my last questions involving connections. I figured out my SS turbo lines the other day, and now im just wondering about this tube that IDK if it went to anything... I never had a oil catch can before, maybe i should get one? \/

http://i187.photobucket.com/albums/x...71/photo-1.jpg

So i know what the T goes to on the valve cover.. the _| goes to the intake, and the L goes down to that golden tube. I figured this because there is a hose that already fits the shape perfectly. What does the circled one go to???

Thaaaaanks!!!