Each terminal member of a first connector includes a protruding terminal, and each terminal member of a second connector includes an opening able to accommodate a protruding terminal. The terminal members form a plurality of rows at a fixed interval in the width direction of the main body portion, and each terminal member is staggered in the width direction with respect to the terminal member in the adjacent row. At least the terminal members on the first connector or the second connector are connected to the tip of the plurality of parallel wiring provided in a different layer than the terminal member in the main body portion.