Attach a Gridfinity base to your MACISTE metal shelves.
You can modify this and make it your own on OnShape:
https://cad.onshape.com/documents/d24f2622791c35e718395ed3/w/44bfdabd1b5ffb85da0e0321/e/3404ed0b73989475b1ab70a2?renderMode=0&uiState=64bec609f831c5689a3d4f2a
As seen in my upcoming YoUTube video:
https://www.youtube.com/watch?v=U9kND5i_FZk