Where is the transmission drainage and filler plug in a 2000 Mitsubishi eclipse?

The transmission drainage is on the bottom of your transmission. You will be able to see it if you lift up your car. Be careful when you work with lifted cars. Usually the filler plug is a dipstick channel. If you don't have a dipstick in your engine compartment then it should be on the one of transmission sides. It's a screw with an attached dipstick. You have to loose the screw and completely remove it before refill the transmission.