Got it. Carefully inserted a straight pin into it to stretch it around the cable end. Amazing what you can do when you aren't afraid you'll tear something up.Hardest part turned out to be stuffing the grommet back into the headlight nacelle. I had popped it out to make it easier to get the cable through the hole.Now to go adjust it. That's probably in the missing manual pages, but I think there are instructions here on the board.