Gear box oil 306 hdi

[Dum-Dum]

I know where the drain plug is for the gear box oil. I tool the air filter of to have a look were the top up plug is but cant see were.

Right to find the filler (its a breather too)

Look at the clutch arm, above that is a white electrical plug, then a white blob, draw a straight line through them and follow that line backwards and youll see a black plastic nut, thats the one you want. dosent need to be done up tight.