Abstract: A housing 41 of a meter unit 5 is inserted from above into a meter unit support hole 43 which is provided in a rear handle cover 1. Engagement claws 411 . . . 3 of the housing 41 are engaged with claw receiving portions 19 of the rear handle cover 1, thereby preventing the housing 41 from coming out. A male connector 25 is provided beforehand in the rear handle cover 1, and inserting the housing 41 of the meter unit 5 into the meter unit support hole 43 causes a female connector 44 of the housing 41 to be automatically connected to the male connector 25, thus completing the wiring work of the meter unit 5. The wiring work on the meter unit 5 supported on the rear handle cover 1 of a motorcycle V can therefore be performed easily and reliably. The handle cover encloses a substrate 21 in which busbars 22 are embedded.