An electrical connector assembly comprising a wire attached to a terminal and a connector body. The terminal defines a pair of terminal wings protruding from opposite side surfaces of the terminal. A cavity within the connector body is configured to receive the terminal. Side walls of the cavity define terminal guides that have guide rails and a guide slots beneath the guide rails. As the terminal is pushed into the cavity, the guide rails urge the terminal wings toward a top wall of the cavity until the terminal wings reach an end of the guide rails. The terminal wings then enter open ends of the guide slots as the wire is pulled cavity and the terminal wings traverse the guide slots until the terminal wings engage closed ends of the guide slots and/or a terminal lock tab engages a lock surface within the cavity, thereby preventing the terminal from being inadvertently withdrawn from the cavity.