Had a peek inside and can't see an area from usb input apart from a header located in the battery compartment, still digging around but the only resources I've found at the moment are -
http://shoryuken.com/forum/index.php?th ... 264/page-9
http://shoryuken.com/forum/index.php?th ... 264/page-6
http://shoryuken.com/forum/index.php?th ... 264/page-8
Here are some pics are inners.
battery compartment

rear of compartment

PCB Header

360 guide

Main pcb front & back


connected

cheers,
MDK