Abstract: This apparatus includes a series of terminal boxes having a base and a detachable lid. Each accommodates a PCB. The terminal boxes are shaped to nest neatly alongside one another. Electrical interconnection between PCB terminals in adjacent terminal boxes is achieved by way of conductive straps which are located partially in a recess in the base of one terminal box and partially in an aligned recess in a neighboring terminal box. Conductive pins extending from the PCB terminals into the base, where they engage the ends of the straps, complete the connections. Provision is also made for connection of the PCBs to external devices, such as switches, batteries and so on. In all cases, the straps, PCBs and pins are concealed so the apparatus is neat and orderly in appearance.