Where is the transmission fluid fill located on a 1996 Mitsubishi eclipse gs with a manual transmission?

It is a rubber stop with a little rubber piece you have to pull, located on the side of the transmission under the battery. you will need a very long and flexible funnel to fill it and when you do fill until the fluid is level with the bottom of the hole. around 2.5 qts i believe. Very hard to find, took me hours.