a base member having a holding surface; and

at least one wire-like transmission member held on the holding surface, wherein

a plurality of missing wire-like transmission member identification marks, indicating a route of a missing wire-like transmission member, are provided on the holding surface,

the at least one wire-like transmission member includes a plurality of wire-like transmission members,

the plurality of wire-like transmission members extend in an extending direction and are held on the holding surface of the base member in parallel to each other in a parallelly held portion,

the route of the missing wire-like transmission member extends in parallel to the plurality of the wire-like transmission members in the parallelly held portion,

the plurality of missing wire-like transmission member identification marks include at least one of a middle identification mark provided between the plurality of wire-like transmission members or an outer side identification mark provided on an outer side position of the plurality of wire-like transmission members in an arrangement direction in the parallelly held portion, the arrangement direction being perpendicular to the extending direction in which the plurality of wire-like transmission members extend in the parallelly held portion,

in the parallelly held portion, the plurality of wire-like transmission members are each fused to the holding surface at a plurality of fusion parts at a predetermined pitch in the extension direction, and

in the parallelly held portion, the plurality of missing wire-like transmission member identification marks indicating the route of the missing wire-like transmission member are provided at the same pitch as the plurality of fusion parts in the extension direction so as to be respectively provided adjacent to the plurality of fusion parts in the arrangement direction.