A connector head carried by the stabilizer arm. A first retaining sidewall and a second retaining sidewall included in the connector head extending outward from the stabilizer arm and defining a longitudinal channel. A plurality of spiked projections carried by at least one of the first and second retaining sidewalls, wherein a point of each spike is directed back towards the stabilizer arm. An elastic block carried in the longitudinal channel so that the spiked projections penetrate the elastic block to hold the elastic block in the longitudinal channel. A receiver having a retention slot cooperating with the connector head to releasably secure the stabilizer arm. A knob projecting upward from a base surface of the retention slot for engaging the elastic block in a friction fit arrangement between the connector head and the retention slot so that the stabilizer arm is releasably secured in the receiver.