IKEA SKADIS Pegboard to Muscle Rack bracket

Hi, I wanted to attach my Pegboard to my shelving unit which is currently my printing setup. It was just unused space that I now use for my tools and have my custom keyboards on it. You may need to drill out the screw holes depending on your printer tuning.

I printed it in ABS+ (what I had on hand)

How many do I need?  

I printed 4 brackets since the pegboard will hold heavy items

Hardware: 

12x M5 20mm screws  (could use 22mm)

12x M5 nuts

24x M5 washers

Prints with no supports. I printed it in ABS+ (what I had on hand)

Link to 5-Tier Muscle Rack 

https://www.homedepot.com/p/Muscle-Rack-5-Tier-Heavy-Duty-Steel-Garage-Storage-Shelving-Unit-in-Black-48-in-W-x-72-in-H-x-24-in-D-UR-245PBB/305553565