Nothing fancy just a push on clip for the terminal covers for the Meanwell LRS-600-12 and LRS-600-24 power units.
Stock clip is wider and slim clip fits if you use the 120mm fan cover mod here:
https://www.printables.com/model/274344-meanwell-lrs-600-24-120mm-fan-top-replacement
The author marked this model as their own original creation.