USB connections- what wires go where?

I recently upgraded my {PC using the compnents listed below

1) Casecom KG-201
Features
• ATX Computer Case
• 4x 5.25" bays
• 2x 3.5" bays
• USB and Audio

2) Asus P4SP-MX S478 SIS651 MATX VGA Sound LAN USB 2.0 FSB533

3) Intel Pentium 4 "Prescott" 2.4GHz 533FSB Socket478 1Mb Cache -

4) 512mb DDR PC3200 400MHz 184pin Extra Value Ram

My question is that the new case came with USB and Audio sockets at the front of the case to one side which I felt would be really useful.

A colleague fitted all the new parts and everything works just fine but due to the usb/audio connections being single wires rather than multiplugged we're at a loss at the where to connect them.

Any ideas/help would be appreciated.