70 step side bed sides-angle brackets

[forcd02]

Working on a 70 short bed stepside, someone replaced the floor with a steel one, used angle iron supports-I am putting the wood back, but trying to figure out where all the braces go-did the sides have an angle bracket welded to it orig, and is it avail-prob need the dim on where to weld it, so all the cross braces would fit
Did a lot of searching, couldn't find a pic that really showed what I was looking for.
Thanks