Abstract: The present invention relates to a mounting structure adapted to conform and be supported about the raised floor portion of a vehicle generally found about the front floorboard area of a motor vehicle generally centrally located between the sides of the vehicle. Such a raised floor portion of a vehicle is generally of an inverted U-shape and often overlies the vehicle transmission or a portion of the main drive train thereof. The mounting structure of the present invention comprises a generally arcuate shaped base support structure that is at least partially flexible and includes an adjustment screw for confining or tightening the base support structure about the raised floorboard portion of the vehicle in a tightly held fashion such that the mounting structure is supported in a firm and upright posture about the raised floorboard portion of the vehicle simply by a gripping action.