Bongo Fury

Can anyone help with this query received at Bongo Towers?

After a search of the archives I have discovered that the Transfer Gearbox takes about 1.6 litres of GL5. Now maybe I am being a little (or a lot) thick, or maybe even having a senior moment, but where are the drain and refill plugs ?

Thanks to Nick Skidmore , after grovelling around you were spot on and I found the drain and refill plugs. Thanks very much, Peter.