System cable connectors are labeled from to top left of the motherboard as follows: power supply connector, 2 motherboard-to-connector card power connectors, SCSI B connector, SCSI A connector, USB panel connector, CD-ROM drive connector, Rear fan connector, SEC IDE connector, PRI IDE connector, Front 1394 connector, LAN_ACT_LED connector, front USB connector, power supply connector, ATX_FRONT_PANEL connector.