I just drove it again and I don't think it's metal to metal, more like plastic or maybe fiberglass? I believe it's coming from as your looking at the slide from inside the the motorhome the top left hand corner, so the very rear top. I can grab it and move it and it makes the noise although not as bad as when your driving. I will also do what blw2 has suggested.
Thanks again to all that has taken time to respond.
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