Abstract: Provided is technology that stably fixes a plurality of harnesses all at once, without using a wire holder. A line-shaping section 30 for routing harnesses 99 is created in a front cabinet forming section 20. The line-shaping section 30 comprises two ribs 40 separated by a prescribed distance and a hook 50 positioned in the center thereof and created so as to cover from the top, when viewed from the side surface. The harnesses 99 held by the ribs 40 and the hook are prevented from being displaced outside, by a hook locking section 54. In addition, routing work for the harnesses 99 is able to be performed smoothly since a sloping surface (a guide section 56) is created in a tip part of the hook locking section 54.