Where does the gearbox oil go in a vauxhall corsa?

Instructions refer to 94-99 M-T reg I think mines a N reg On top of the gearbox is a breather, Location is beneath the diesel filter and towards the engine. A bit awkward to get at. There's a strange shaped nut with a plastic cover/hood. undo that and the oil is placed in there. Make sure the car is level. the over flow plug is behind the nearside drive shaft. from empty it takes 1.65 litres no drain plug you have to remove or loosen the plate under the gearbox. Just done it after replacing my engine. Hope this helps Graham Another way:

Its much quicker to take out the speedo drive and pour the oil in. Filling through the breather takes ages as it blocks up.