Ok so to answer the one question, yes that motor mount has fluid in it.
Also when my water pump went just the other day it dumped coolant right where you are looking. The weep hole for the water pump ejects right in that pocket.
I doubt it is oil coming out of the valve cover. My car had 185k on it and the valve cover seals were in perfect condition.
Check your oil, does it look milky at all? Does it have a coolant smell?