Abstract: A security box includes a base having a support wall with four countersunk mounting holes through which mounting bolts extend to attach the base to a building wall while spacing the support wall from the building wall. The base has a top wall extending substantially perpendicular to the support wall and having L-shaped rails on its opposite sides within which a mounting plate for cable TV connectors is supported. A cover has a top wall overlying the top wall of the base with a flange on its rear to overlie the support wall. The cover also has a front wall, side walls, and a bottom wall with the bottom wall fitting between a flange at the bottom of the support wall of the base and a pair of L-shaped flanges extending forwardly from opposite sides of the support wall and inwardly towards each other. One of the flanges cooperates with a cam-type lock, which is mounted on the front wall of the cover, to lock the cover to the base.