ok, I was taking my headlights apart and I took off one of these sort of plastic ball joints (now I know I didn't have to but thats beside the point). It has a little plastic ring on one side and the plastic ball joint on the other. I figured they just had to be pushed together or something but I can't figure out how they click together. Anyone ever put these on or know where I can get more if it turns out the thing is busted and I just can't tell

thanks
joe