Oil Leak

I'm wondering what the green thing is circled in the picture.... just trying to fix an oil leak on a 2003 chevrolet impala

http://imagizer.imageshack.us/v2/150x100q90/c/708/lc0k.jpg (http://imageshack.com/i/jolc0kj)

http://imagizer.imageshack.us/v2/150x100q90/c/5/zxr1.jpg (http://imageshack.com/i/05zxr1j)

It's difficult to see in the photos, but may be drops of coolant.

Is it me or are the top and bottom photos, revered horizontally?

First thing I would do, is go in there and wash that area down with some Brake Klean....two areas I would be checking would be the PS pump/lines and also the oil pressure sensor.....

Coolant leak? Possible w/p or plastic elbow above it on lower intake....