no photo. no digital camera.
it's really simple. extend the fresh water drain that pokes out from under the trailer with a piece of tubing that terminates with at 3/4 inch male hose fitting. tie wrap it to something so it doesn't drag on the ground. go look at your box, see if you can't imagine it
on my TM, all of the drains have valves on them, they all exit from the bottom of the trailer on the same side as the sink / fresh water / gray water tanks. they all have a 3/8" (i think) nipple end.