Where is 2003 1200 sportster oil drain plug?

it's the oil line that connects directly to the center post of the frame, under the oil tank, towards the very bottom. It is connected to a 3-way and is the shortest one about 3 - 4 inches long. It is held on by a hose clamp. Just unclasp, pull hose off the nub and let it drain. (warm bike up & remove oil cap for better flow)