Trouble Locating AC drain line hole because it's clogged

Over the past couple months, I have noticed liquid getting into the passenger floor board of my 2010 fusion.... Obviously this is more than likely the AC condensation leaking because of the drain being clogged. This is likely due to me always parking under a tree at most time which likely caused it to get clogged. I've done my fair amount of research to figure out where the drain line is but I just can't seem to find it. I'm sure its pretty far down under the hood. And if someone does happen to know where it is, what would be the best way to go about un-clogging it? I seen people used canned air, just spraying it into the hole?