I like having a lot of work holding options in my workshop so I bought a Klutch steel welding table for some woodwork. I found that there weren't many accessories available, so I borrowed from my previous corner design for CNC (https://www.thingiverse.com/thing:2621048) and reworked into OpenSCAD.

I also measured the diameter of the pegs included in the kit (1.5" or 38mm), so these braces should line up with them as well. As it's parametric, it should be easy to adjust for other sizes & applications.

For me, the 16mm pegs are slightly too large for the holes. I'd suggest 15.5mm, depending on the dimensional accuracy of your printer.