Removed them when I installed my Ryzen 3 2300X, I assumed I'd never need them. I got my Ryzen 3 2300X because a store in my country (Bulgaria) was selling them for like 70$. When I first installed it I thought the cooler, since it was meant only for OEM, didn't use what I presumed were "user-friendly cpu cooler installation things" and I removed them, and now, a year and something later, I can't find them. I'm on my way to buying a Ryzen 5 2600 and now I wonder if I need a new motherboard since I've got no hope on finding these plastic pieces?