I just noticed a small puddle of coolant under my car, 3-4 drops behind the motor on the floor of my garage. Based on the stain its been leaking for a little while. Not too long ago I had the TB off the car, that has cooling lines and could account for a bit of the stain; but these drops looked fresh. I also saw some drops on the exhaust mount behind the tranny. One of the bolts had backed out, that's how I found it.

The line connections look secure, what else is on the firewall side of the motor that can leak coolant?

 

any chance your headgasket is leaking? When mine blew I found coolant sitting on the transmission hump.

 

the easiest way to find it is to clean the area with degreaser and water, toss a bottle of coolant dye in the radiator, drive it a day and pull it in a dark garage and point a black light at the area. the leak will glow bright green.

 

Good advice this is the best way to check for leaks.