I found this table on the curb a while back, less the leg hardware. No a relative could use it, and I'm wondering how to fix it up.
Cut a couple 2x4 sections to fill the truncated-triangular area and screw through them into all surfaces?
The legs have a hollow center drilled out, at the top, so I assume some metal piece with threaded holes fit there, and a metal plate anchored that to the skirt (?).
Another view:
https://a.co/d/itDchTv
There is a link to the hardware you are missing. You may need to fill the holes in the leg (glue & toothpicks) or a wooden dowel and re drill if the threaded bolt does not catch
I’m pretty sure I have exactly this same table. We got it from Ikea around 16 years ago (and it’s surprisingly good quality for Ikea).
That bracket you linked to looks exactly like the hardware on ours.
Where I live Ikea tends to give spare parts away pretty easily, might be worth a try