Rocker trim just fell off

Hey, everyone....

I'm guessing it was a trip to the evil car wash, but when I was driving today, the driver's side rocker trim piece suddenly came nearly entirely off. It being about 8 degrees here, I made only a lame-o attempt to replace it, but I'm guessing there's an end cap? missing or some other retainer clip. I haven't gone out to look at it on my drive (too darned cold). But I'm hoping to get this back on. I just secured winter storage (tad late) and want to put it back in one piece. I'll look closer at it tomorrow after work (and maybe take a pic), but I'm hoping somebody may weigh in with a good suggestion. :icon_confused: