I dropped mine in. There’s a pretty obvious place for them to do so. No rattling that I’ve noticed or any other issues since install. Love the look.I just ordered the ones From AutoTecknic today. The clear LED have the resistors that help prevent errors. They are expecting a shipment of smoked soon. These too will have resistors. I’m not sure why the resistors were added with a connector and not soldered in place? The lead for the resistor seem pretty long and I’m still trying to figure out if I should secure it or just jam it in somewhere. This will be my second attempt. The last ones I bought were incandescent. Unfortunately, my sockets didn’t fit properly and didn’t seal correctly. This was a lot easier with my Cayenne because there was an OEM part available.