Rear gearcase. angle drive fluid change.

I have a Haynes service manual (1st mistake), and it appears to have omitted the rear gearcase fluid replacement section. As much as I can figure it takes 5 oz of angle drive fluid. Can anybody direct me to the drain plug and fill hole? This is the first wrenching I am going to do on an ATV and appreciate any newbie info. Thanks. m.breen.