A twist-on wire connector includes a connector cap and a tapered coil spring configured to be secured within the connector cap. The connector cap includes a peripheral wall extending between open and closed ends of the connector cap and defining a connector cap recess, top portion having the closed end, bottom portion having the open end, and asymmetrically opposed wings. The asymmetrically opposed wings are positioned to offset from a centerline of the connector cap to provide a comfortable grip while turning the twist-on wire connector during electrical wire installation