The HW 296 is a pop-up correct?
In my pop-up the low point drains are under the sink close to the interior wall right behind the converter.
They are close enough to the interior wall that I didn't know they were there until I went under the camper looking for them for winterizing and found the outlets. I saw about where they should be and had to feel around for them because I could not see them through the small access door.
There was one for the hot line and one for the cold. They had the same type of valve as the hot water heater bypass valves.
I wish I knew THAT earlier in the season
Hope it helps