After I got the Original Prusa Enclosure for my XL, I realized I could not use Surfalex2000's excellent 2 steel sheet holder any more. My DIY cart was not designed to hold the print, but a couple of “ears” would do the job. The mounts attach to the original steel sheet holder parts with M3 square nuts and M3x6mm socket head cap screws. Then use whatever screws you have handy to mount them to wherever you need. In my case, it was the legs of my little DIY cart for my XL.
Print in any material. No support needed.
The original steel sheet holder models are here:
https://www.printables.com/model/593481-prusa-xl-series-integrated-steel-sheetx2-holder
This may, or may not, work with remixes or variations of those original models.
The author marked this model as their own original creation.