Patent attributes
Upon releasing a locking arm from a connecting terminal by inserting a jig through a front holder, the jig could not be erroneously inserted into a terminal inserting hole. Connecting terminals are inserted into a housing, and the connecting terminals are prevented from being pulled out of the housing backwardly by means of locking arms arranged above the respective connecting terminals. The front holder is engaged with the housing by a clamping mechanism in an axial direction and is movable laterally in a direction perpendicular to the axial direction. A pair of terminal inserting holes and an arm operating hole 18 provided for respective connecting terminals are shifted laterally. In a first position of the front holder, the terminal inserting hole is aligned with an axial line of a female-type connecting terminal, but the arm operating hole is shifted laterally from the locking arm.