Where is the transfer box on a 2000 Land Rover Discovery II?

I need to change the gear oil and can't find it! Is it behind or in front of the tranny?Where is the transfer box on a 2000 Land Rover Discovery II?
The transfer case is behind the transmission. The filler plug is behind the hand brake drum on the side of the transfer case. You need a 1/2" drive ratchet to take the filler plug and drain plug out. The drain plug is at the bottom of the transfer case.