The right side of the transmission (in the orientation of it being installed in the car) has two 6-point plugs. The top is the fill, the bottom is the drain. You need a 17 mm hex socket to fit those.
Removal is very easy. If it's out of the car already, just unbolt the 3 nuts on the four corners at the front of the transmission holding it to the engine and remove the starter. That's it.