FC Roof AC drain tubes for new units

[hifreqdude]

Thank you Steve and Ernie, I appreciate your responses guys, I have had the original units off when I first got the bus to service and reseal them, and found no drain tubes.
I really do not want to have them haphazardly drip wherever if possible. I will most likely construct a system of 1/2 ID PEX or something with tee's allowing them to drain fore and aft, or route them to the shower vent drain as Randy suggested in a post if someone does not have a better vision. I have begun stripping the armadillo plates and goat rails to inspect and refinish the roof.(Man! those things are heavy!) The roof looks great so far with the exception of one minor surface rust in one spot which is already Ospho'ed to turn it.