To see that a wire harness and a connector at a terminal are not caught therebetween when mounting a fuel tank to the panel of the car body.

A hard tube 11 is attached outside from the terminal of a wire harness W/H, also an L-shaped guide plate 10 is attached at a distance S being a required interval, and the above section at the distance S is made a bendable part K, whereby a connector 17 can be temporarily placed on the topside of the car body floor 3 easily through a work hole 3c, locking the wire harness W/H to the floor 3 of the car body. In this condition, the wire harness W/H prevents the droop by the hard tube 11, so it does not interfere with a fuel tank, either, and dissolves the catch, too.