FOUND IT, nearly dark here took the flashlight back out to the coach with determination in my eyes got down on the 3/4 minus and started crawling around, there is a pair of hoses (one 1/2" i.d. the other 1" i.d.) coming through the floor (drivers side) between the gas filler and the rear bumper, about a foot from the outside wall and a foot up from the bottom of the wall there is a small hand valve in the 1/2" hose (like the fill valve on a house toilet) Thanks to all that contributed to the cause. So on to the next mystery. Vince thanks for the tip about the water filter.
"No matter where you go there you are"
1998 FR Georgetown 320 GM 454 Banks Power Pack. 1998 RAV4 toad.