1. Firewire is pretty much obsolete and will be fading away just like floppy disk connectors, power reset switches, and internal speakers on motherboards. In addition VGA and DVI ports will eventually disappear. The new displayport standard has been adopted for video cards.
2. Front panel USB cables are plugged into the USB ports on the motherboard. The USB ports are usually, but not always, located at the bottom front of the motherboard.
3. Check your motherboard manual for the location of any external SATA connectors. Manufacturers don't always put them in the same location.