I was dropping my brother off at work (he owns an 04 wrx and it breaks a lot) and on the way home I started hearing a metal scraping noise, and since i was a couple blocks from home, I drove it. Looked under the car and one of the rear lines hanging under the subframe connector on the pass side is sheared. nothing came out, so I assume it's a brake line for my rear drum brakes. Am I correct, How do I fix this?