The file 'Ender 3 Side Spool Converter Bracket 3D Printer Model' is (stl) file type, size is 54.87 KB.
This is a remix that removes the need for extra hardware and allows you to use just the screws and T-nuts used to hold the stock spool holder on Ender 3.
Full details are in this video: https://youtu.be/nBjldxIsOhQ