Coolant leak
 

Anybody got schematics for the coolant system of a 1999 Mazda 626? I've got a leak and can't figure out where it is coming from. I've narrowed it down to what looks like some kind of rubber nipple above the oil filter, but its in such a tough spot that I can't confirm that's where the leak is.
Any help is appreciated!

Love my little Mazda!