Lights of America Under Cabinet Light Clamp

Update: I updated the clamp so it will hold better. I made the slot .05 smaller and made the top shorter so it will slide in further and hold tighter on the rack.

I have multiple printers that I needed to make space for. So I bought this 7 foot shelving unit from Lowes.
https://www.lowes.com/pd/edsal-Muscle-Rack-84-in-H-x-84-in-W-x-24-in-D-4-Shelf-Steel-Freestanding-Shelving-Unit/50124305

Then I needed lights. I already had some of these lights for the Ikea Lack table enclosures I had pr