A mounting arrangement and method are provided for securing a T-joint in a control cable connectable in electrical communication with an electrical device, such as an electrically controlled nozzle, attached to a mounting surface such as the boom of an agricultural product sprayer. The mounting arrangement includes a base block adapted for fixed attachment to the mounting surface, and a pair of first and second clamping shells adapted and cooperatively configured for attachment to the base block and one another to define an internal cavity of the mounting arrangement between the clamping shells and the base block for receiving and retaining the T-joint within the mounting arrangement. The mounting arrangement is attached to the boom with a single threaded fastener. The clamping shells are identical and lock to one another and the base block without additional fasteners.