Where is the coolant drain plug on the block of a 93 Pajero 2.8 TD engine 4M40 motor?

Mate, I've been hunting as well and finally found it- a plug just to the rear engine side of where the oil filter screws on- see link, section 14-4

http://www.mitsubishi4wd.com/manuaalit/pajero/xpajeromontero01-02/Pajero_Montero%2001-02/PWJE0001/COVER_E.pdf

Cheers, Aaron