Thanks for the guide Nick!
I'm replacing one light that snapped off. Found a replacement online for $46.50 from subarupartswarehouse.com. Seems like a cheap fix judging by how much other people are paying for the whole kit.
Anyways, the nut seems to be in between 3/8 and 7/16 inch. I need to pick up a metric wrench set. Does anyone remember if you used 10 or 11 mm? I found a cheap set on Amazon that skips 11 mm, will this be okay?