A locator is for aligning cables which are configured to be connected with a circuit board having an accommodated portion. The locator comprises at least a main portion which extends in a pitch direction. The main portion is, at least in part, formed with at least one circuit board accommodating portion. The main portion is formed with at least one first through hole and at least one second through hole which is different from the first through hole. The at least one circuit board accommodating portion is configured to accommodate the accommodated portion of the circuit board. The at least one circuit board accommodating portion opens at least forward in a front-rear direction perpendicular to the pitch direction. In the pitch direction, the at least one first through hole is provided at a location which is different from a location of the circuit board accommodating portion.