A scalable multiprocessor computing system includes first and second computing devices and a link module connecting the computing devices. The link module includes a guide connector that aligns and couples the first computing device with the second computing device in an orientation in which a printed circuit board assembly (PCBA) support housing wall of the first computing device faces a PCBA support housing wall of the second computing device, a bracket member that is connected along corresponding lengthwise sides of the first and second computing devices, and a cable connector that provides a signal connection between the processor of the first computing device and the processor of the second computing device. The guide connector is connected to the bracket member.