I don't think this model will do that - it is either a right hand or left hand version. The one I have is left hand which is accessible thru an outside door on my POPUP. The pull out tank is almost the same size as the width of the cassette pottie.
The OP said he ordered a left hand version so it looks like it will come into the inside hallway the way he is planning on installing it.
Those tanks are great being water tight. Mine will not even leak if I turn it over when I am pulling it on its two wheels. Already done that haha... It has a good carry handle so will go down the trailer steps pretty good I think. I have brought mine into our house here before to dump down our house toilet.
Roy Ken
