Bought a 1976 fiat 124. I parked facing down a hill and a black plastic resivoir behind the left front headlight was pouring gas out. This resivoir is fed from a metal price coming from behind the steering wheel (left side because AMERICA). This metal pipe had a rubber house leading to a black resivoir. This short 2 liter sized container has a hole drilled in the bottom. I didn’t know why it would just dump fuel so I removed the resivoir and clogged the metal house. WHAT IS THE METAL HOSE/RESIVORS PURPOUS?