That's an easy fix, especially since it's a top side problem.
Clean up all the leaking coolant so it's spotless. Start the vehicle with the hood open, get under the hood and let the engine run until you can slowly spot where the coolant is leaking from. I've done this before plenty of times and you just have to be patient, but as soon as you see one drip, that's you're problem area.
Then all you have to do is replace the part that's leaking. In this case it's either going to be a gasket or a hose.