Question came up on another forum and I posted the following picture. Thought I would post it here also in hopes that it help someone in the future.
The yellow dots are the location on this original support where it was welded to the inner fender apron. IMHO good chance that the locations are somewhat random though the number nay have been what the worker was told to produce on each one.
Don't recall where I found the original picture - likely another forum but thanks to that original poster the info is going onward to help others