Transmission Overfill

Hello, this is my first time on the forums, so please forgive me if I’m asking this question under the wrong category. I have a 2002 Ford Explorer Sport and just changed the transmission fluid. I accidentally overfilled when I noticed the fluid spilling out from a “spout” that was located right next to the transmission pan. Is that some sort of “reliever” for excess transmission fluid? My transmission pan doesn’t have a drain plug. If so, do I need to pump-out the fluid anyway? Or does that spout take care of it?