Heavy-Duty Power Rack Attachments, Quick-Install Home Gym Accessories for 2x2, 2x3 & 3x3 Power Racks, Fits 1/2", 5/8" & 1" Holes

I bought these a couple of months ago and they work great. https://a.co/d/0gUIbzSp

Here are alternatives for the expensive pins for putting the straps on your rack https://www.amazon.com/dp/B0DJPM9MM4