A connector assembly for releasably attaching a stabilizer arm to a support arm of a vehicle exterior rearview mirror. The assembly includes a connector head carried by the stabilizer arm and a connector receiver is carried by the other of said stabilizer arm and support arm. A retention slot is included in said connector receiver for receiving said connector head. A biasing element is carried in said retention slot for biasing against said connector head when received in said retention slot. A catch tongue projects from one of said connector head and said biasing element. A catch recess is carried by the other of said connector head and said biasing element which is complementary to said catch tongue for interlocking said connector head with said biasing element in said retention slot to provide an increased surface area of engagement.