Injector problem

[Y444TES]

As it says in the title I've got a problem with the pipes on the injectors the rubber return pipes I think the the first injector cam belt end the pipe goes to the fuel return and they are all linked together until the end injectors gearbox end the last pipe goes to nothin and I think diesel leaks out slowly I was just wondering were the pipe was ment to go any advice would be help full thanks Sam