My
Casita has custom clip support points for
awning support riveted directly onto the
fiberglass and I don’t think that there is any extra inside support. Unfortunately, the prior owner removed the
awning after it was damaged beyond repair by a windstorm leaving the support points on the bottom/side and the roof mounted mounting brackets.
In lieu of the flagpole holders, I would think that bimini fittings normally used on boats might be better and less obtrusive. For example:
support and
frame. I suspect that there are different sizes which hopefully would fit your awning supports. They are also available in stainless steel.
And, yes, I would use silicone sealant when riviting/screwing the supports to your Bioler.