Here is a Gridfinity base for the Ender 3 S1.  This screws to the side of the printer right were the screen goes.  I use Klipper so i no longer have the screen installed.  I have uploaded both with and without magnets.  I am currently using without magnets but will change because i keep pulling the bins up when I grab my build plate cleaners.  

If you need something else let me know.