Those are foam cushions to prevent chaffing of the fiberglass, I use then on all removable canopies. They are manufactured by Secraft and I purchase them from F3A Unlimited.
https://www.f3aunlimited.com/hardwar...g/floating-pad
As an FYI I use the removable battery tray because It makes services the interior much easier.
https://www.f3aunlimited.com/powerpl...tray-kit-large
https://www.f3aunlimited.com/gator-r...ket-kit-grcrtb
Feel free to ask any question.
MB Gosson