I've been using the clamps from https://www.printables.com/model/310697-step-clamps-m6-for-cnc for a while - they work well with my machine (M6 bolt fixing).
So - three bins.
One to hold the clamps themselves. The angled inserts allow for choice in what direction the clamps face regardless of whether its the normal or reversed version.
One to hold the braces/ends and some M6 washers.
The last one to hold a range of M6 bolt lengths - I often need to get the head of the bolt down low to avoid crashing with the vacuum chamber on the CNC head - and this just allows me to avoid having to screw in a bolt way too far thru the bed just to get it low enough. For my bed - I have a range from 30mm to 50mm in 5mm steps.
The author marked this model as their own original creation.