Abstract: A termination structure for mating a cable connector to a circuit board has a ground terminal and two signal terminals arranged in triangular pattern through the connector in order to reduce the impedance through the connector. The width of the ground terminal increases along its extent with respect to the signal terminals. This increase occurs along either a transition or contact portion of the ground terminal.

Abstract: A waterproof sheet is adhered on an inner surface of a door panel. A wire harness W is arranged on the waterproof sheet on the door panel. A first connector is connected to the wire harness. The first connector is held at a predetermined position on the door panel. A door trim is mounted to the door panel and covers the inner surface arranging the wire harness. A switch unit is mounted to the door trim. A second connector capable of fitting to the first connector is connected to the switch unit. When the switch unit is mounted to the door trim fixed to the door panel, the second connector is guided by a guide member on the door panel so as to fit to the first connector at a predetermined position. Accordingly, the connector can be easily fitted. Further, a poor connection and a disconnection of the wire harness can be securely prevented.