That is some skilled work! I've always wondered, how do you go about welding two halves together where there is a multilayer box section?
The inner rocker had a factory seam. Just drilled out the spot welds and slid the new piece back in place.Blue arrow.
The inner reinforcement was cut longer for overlap. Plug and stich welded. #6
The outer rocker was cut large enough to have access to weld the reinforcement and the piece was butt welded on each end. #1
I had detailed pics but for some reason they are too small to see and resizeing makes them blurry.
The car didnt need the whole clip. I think doing it this way is a better repair than trying to piece the quarter, wheel house. rail, trunk floor and tail panel together. That is a whole different argument in the bodyshop biz.