CONNECTOR

A connector for connecting and anchoring a base wire harness and an optional wire harness, the connector being provided with a first connector that includes a connected portion and is anchored to the base wire harness, and a second connector that is anchored to the optional wire harness and has a connecting portion that mounts on the connected portion. The connecting portion mounts on the connected portion from a direction that follows an outer surface of the base wire harness as viewed in a length direction of the base wire harness and engages with the connected portion in the length direction of the base wire harness.