2000 S10 Evaporator Drain

I've got a sloshing noise coming from under the dash on my Son's 2000 S-10. I think it's excess water in the evaporator. There is a bit of water dripping out of the assembly in the engine compartment, near what I think is the AC dryer. It drips down near the A-Frame. I looked all over, inside and out for another drain but couldn't find one. I've searched the internet for someone that has had this problem but couldn't find a good answer as to if there is a drain and where it is. Hope maybe someone hear has experienced this and can tell me where the drain is.