Figure showing the 3U double-wide alarm card installed in slots 1 and 2 (front) and alarm rear transition card installed in slot 1 (rear), host CPU card (front) and host CPU rear transition card (rear) installed in slot 3, and I/O cards or satellite CPU cards (front) and I/O or satellite CPU rear transition cards (rear) installed in slots 4 and 5. Slot 2 in the rear is empty. Cables for all cards extend from the rear of the server.