Air Bag Light after scraping front left fender

2006 Sonata backing out I scraped driver front fender on post. Bumper came a little loose by wheel well. Now Air bag light is on (I just moved bumper back in place) I believe their is a sensor just above wheel, if so how would I access it? Also there's a small box with 50A fuse near battery and main fuse box that looks blown (have to remove a screw to get fuse out) anyone know what that is?

 

Problem fixed? Couldn't figure this out. However, needed to replace a turn signal light left front (near where I hit the post). Removed the light assembly (yes 3 bolts and pull unit out), replaced bulb, reinstalled light assembly and airbag light is normal again. I replaced that weird fuse weeks earlier, so that wasn't it.