If the line is leaking it should be fixed. Without looking at it, it's hard to give exact directions. Maybe it needs to be tightened if the leak is at the fitting (unlikely). More likely, the line is rusty and needs to be replaced. If the other lines are rusty and flaky they need to be replaced too. The new lines do not have to follow the exact path the factory used as long as they get there. But from what others are saying, you can get access to them thru a removable panel.