Connector housing mounting structure with misinstallation prevention feature

A connector housing mounting structure comprising:

• a connector housing receiving terminals connected to an end portion of an electric wire;
• and
• a mounting member having a mounting surface for mounting the connector housing thereon,
• the connector housing being mounted on the mounting surface of the mounting member,
• the connector housing including a housing body, and a pair of flange portions extending from the housing body in opposite directions to each other and having first mounting holes respectively,
• the mounting member including a pair of first columnar portions corresponding to the pair of first mounting holes and protruding in parallel with each other from the mounting surface,
• the pair of first columnar portions being inserted into the pair of first mounting holes, and the pair of flange portions being fixed to the mounting surface with first fastening members, thus the connector housing being regularly mounted on the mounting surface,
• a size of one of the flange portions in a width direction perpendicular to an extending direction of the flange portion being larger than a size of the other flange portion in the width direction,
• wherein the mounting member further including a pair of mounting portions to mount the mounting member on a mounted member, the pair of mounting portions being located away from the pair of flange portions on one side and the other side of the flange portions in the width direction respectively to eliminate an interference with the connector housing, when the connector housing is regularly mounted on the mounting surface, and
• one of the pair of mounting portions being located to interfere with the one of the flange portions, when the first columnar portion corresponding to the other of the flange portions is inserted into the first mounting hole of the other of the flange portions and the first columnar portion corresponding to the one of the flange portions is located outside of the one of the flange portions in the width direction to be in contact with its outer surface.