Exterior Room on a 57 Overlander

[57Vintage]

The 57 I purchased had an exterior room at some point. Most of the parts and canvass are still there but probably not complete. I suspect some of the poles are missing. I've never unfolded the canvass pieces. See photos for attachment points and poles. It was as long as the body less the caps. Can anyone identify? Anyone have a need for any of the poles or the lower attachment brackets? I won't be using.

Thanks Harold

[57Vintage]

Pictures didn't attach.