Using available space on welding trailer to mount Vise

[CrazyHorse!]

Well being work not steady these days I have had allot of time on my hands
My welding trailer is small and I don’t have much room on it so I am using available space, I needed to have a vise on hand from time to time so was looking at the trailer to see where I could mount a vise so there were some pieces of square tubing welded to it by previous owner who had this little tote trailer I think was a sprayer at one time.

So this is what I came up with not really a supper ideal but it will work for as often as I would need it.