I installed a .062 inch thick x 2 inch wide x 7 foot 1-1/2 long stainless steel
strips over the tube, but under the fiberglass walkway. These ss strips were on both side of the walkway and attached using the same walkway bolts.
The Azec panels
were butt against the walkway and then screwed to the SS strips and tubing with #8-32 counter sunk screws that become hidden when finished.
I drilled and taped the tubing for the #8-32 counter sunk screws.
I had Mystic Stainless do my work, but any local fabricator can do this for you. The drawing are pretty simple.