A spring mounting clip is provided that preferably includes a spring arm coupled to and extending from a mounting base. The spring arm bends aside as the mirror is pressed against the back wall of a PTV enclosure and spring back to its original unstressed position once the mirror engages a notch in the lower arm portion. The notch preferably includes a locking surface that abuts and constrains the mirror. Alternatively, a spring mounting clip is provided that includes a spring lever arm coupled to and extending between a pair of support legs, which extend up generally at right angles from mounting feet. In operation, the arm, which includes a locking member moves inwardly toward the support legs as a mirror or other object presses against the arm and moves outwardly or freely springs away from the support legs once the mirror or object passes a transition region of the lower portion of the arm and is received by the locking member.