Answer from the Web:
"To do this job requires a lift and a special 8mm square socket. Just above the right side axle at the transmission there is a bolt with a square head. This is both the fill hole and the hole to check the fluid. The car needs to be running and in park with the vehicle at operating temp (drive for a few miles or let idle for at least 5 minutes--then put your foot on brake, run car through the gears, then put the car safely up on jack stands). Fill the hole till a small stream of fluid flows from the hole. That is when the fluid is full."