If you haven't purchased it yet, you may want to consider Rubbermaid Configurations instead.Closetmaid wire shelving. Getting it at Lowes.
I actually have something similar. Not sure theyre as strong as what youre using.IF, you're just trying to line up where the studs are to attach the shelves to a strong backing, you could just use rare-earth (hard-drive) magnets to locate the studs (screws), like I do/did. It works just fine and leaves no mark.