Just completed my first build using an Antec Sonota case..... I couldn't remember for sure, but found this in my Antec Sonata user's manual..... Hope this answers your question:
IEEE 1394 (Firewire, I-Link) Connection
There are six wires with connectors coming out from the front-mounted IEEE 1394 port of your case. They consist of 2 sets of twisted pair cables; TPA (Twisted Pair A) and TPB (Twisted pair B), a power cable (VP), and a ground cable(VG).
Hope this helped!