Abstract: A mounting plate and locking key are arranged to mount a camera lens housing to a faceplate. The lens housing extends through a hole in the mounting plate so that an end of the lens housing is aligned with a hole in the faceplate. The mounting plate is a thin, elongate rectangle having a raised central portion and a pair of support members extending in opposite directions therefrom. The locking key is a thin elongate rectangle having a generally U-shaped opening formed in one end. The locking key is inserted between the faceplate and the raised central portion of the mounting plate. The U-shaped opening is then in alignment with the hole in the mounting plate so that edges of the U-shaped opening are engaged with the lens housing.