Abstract: A locking apparatus and method for securing panel cabinets. The locking apparatus includes a mounting plate that includes at least one slot; and a support bracket that is projectable substantially diagonally upward from one end of the mounting plate, extend horizontally in parallel to the mounting plate, and is then projectable substantially diagonally downward to an opposing end of the mounting plate, wherein the mounting plate and the support bracket includes a frame that is placed on a cabinet. The support bracket may further include at least one crossover bracket that is configured to accept and hold at least one crossover tube and is further configured to accept a lock to hold the at least one crossover bracket and the at least one crossover tube together. The frame may be removably placed over a mounting bracket.