OK, I have a little update on putting the trim rings into the chrome bumper. I went out and removed one so I could get some pics of how I get them.I really didn't have any trouble putting them in. The first tab to align is the bottom left side of the ring (while looking at the front/outside of the driver side ring). On the edge of the opening in the bumper there is a spot that has a raised "bump", that's all I can think to call it, the tab on the ring goes onto this one first. Then push the other side in. That's all I did other than to make sure the other tabs where all the way in. Maybe but a little bit of light lube on the edge to help it go in. (wait for it) Good luck and don't give up.
All right then. Here is the bumper with the ring removed. The "bump" that I mentioned, I mistakenly said bottom left when I should have said top, is easy to see in the pic. Slide the corresponding tab on the ring onto this one first.
That would be the tab located on the ring in the top right of the picture.
Kinda hard to tell in this pic but the next one to put in is on the bottom of the ring. Rotate the ring slightly counter-clockwise to get clearance for it then rotate clockwise to seat it.
The last one is the finger tab. Reach your finger through the inside of the ring and depress the tab. Push the ring in the rest of the way and make sure the finger tab has seated. That's it. I took about 5 min to take the ring out and put it back in with a helper taking the pics. Hope this helps anyone that is having trouble. Please note that these are OEM parts. Aftermarket may be different.