A circuit breaker apparatus is provided and includes a circuit breaker, having a housing surface perpendicular to a plane of a front side of the circuit breaker and internal components, a terminal block structurally coupled to the housing surface, first terminal housings arrayed on the terminal block to each support first components and to be receptive of second terminal housings each of which supports second components, at least some of which are electrically coupled to the internal components, to be electrically coupled to at least some of the first components, and an access block. The access block is disposed on the terminal block and has apertures defined therein to provide for front-side access to the first terminal housings.