Where to add transmission fluid

Hello, I know you might laugh out loud because of my silly question...but I really don't know how to add more transmission fluid. I just checked out my 92 Dodge Caravan (with 175,000 miles on it) and found out the fluid level stays at ADD bar. The remaining fluid looksclean and good to me, I just want to add a little more but I really don't know where to add it. I realize that I would use 7176 fluild when adding.

Thanks in advance.

you add fluid by dumping down the tranys dip stick tube. Add a 1/4 qt. at a time and check level after each time over filling can cause shitfing probems you di check the level with the van running and at operating temp and the trany in park?

Thanks much for the great info...I was able to add it w/o any problem.