A method and apparatus are provided for holding a medical instrument. The medical instrument is held in a cradle (112) having first and second interlockable regions (114, 116). The cradle (112) is coupled to a first mating element (124). The first mating element (124) is coupled to a second mating element (126) through a selected aperture (128) of a platform (16), such that the cradle (112) is coupled to the platform (16). The platform (16) has multiple apertures (128, 130, 138).