A belt connector and method for interconnecting opposite ends of a filtering belt has a plurality of wire hooks, each with two shanks disposed adjacent opposite faces of the belt, a coupling loop interconnecting the shanks and hook ends that are pressed into the opposite faces of the belt. A first lens group, a second lens group, and a third lens group are disposed along an optical axis, among which the second lens group is a movable lens group movable along the optical axis. An amount of signaling wiring present within a distributed multiplexed bus interconnect is optimized by eliminating individual signaling wires based upon whether an Intellectual Property core connected to the multiplexed bus interconnect transmits or receives signals from the distributed multiplexed bus interconnect. The auxiliary speed-change shaft is disposed parallel to the first and second input shafts.