The optional mounting arm is offered for use with the Route Solutions Vehicle Cradle. This kit provides a more versatile method of positioning the RW 420 Route Solutions system. The mounting arm consists of an arm with a ball and socket joint at either end, which in turn are terminated with a mounting flange. One flange is secured to the Route Solutions Vehicle Cradle by the four mounting holes provided on the bottom plate, and the other is secured to the desired mounting surface. A clamp on the arm locks the Cradle in the desired position.