Coolant leak, but no idea from where...?!?

I touched all around the studs and everything feels dry!?! The freeze plug isn't dry but it isn't dripping wet either.

I'll get that pressure kit and try to nail this once and for all! Been busy at work so haven't had the time yet...

Thanks guys
Isn't dry? Your problem, and the rest are fixing to go. Get brass ones, from boat places.