fill plug is in 1 of 2 places, on the side of the bell housing area, (sort of behind the wheel) really faffy, oil dont come out of it, but putting oil in usually results in spillage as u have to squirt it in through a tube which u usually get with the oil (unless u use mobil like me!!) when the fresh oil starts to trickle out on its own theirs enough in...
to check the level u put your finger in and if the oil comes up to your finger its ok
its faffy to do as the car has to be level and thats hard as the job is best done with the car jacked up!!
theirs a drain plug on the underside of the box...