Here it is in a slightly different configuration on a previous camper.
Currently, I only use one vertical piece. The wheels are bungee strapped tightly to the base, and another bungee wraps around the tote, holding it against the single vertical bar.
The original base piece was about 5-7 inches longer to accommodate two bikes. I used a hack saw to cut it to a size that just fits the tote. New black paint finished it off.
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