Hopefully an easy question with an obvious solution

I'm in the process of putting together a USB arcade stick for use with shooters (shmups) on my xbox 360. I've ordered one of Harumans rather cool pad hacks.
It's a wired one and I was planning on using one the connectors (see attached image) at the back of the joystick - The pad plugs into one end of that and I can use a 3 meter cable to connect it to the 360 without risking the pad being damaged from people/cats tripping over it.
Problem being, the 360 pad cable is 3meters long and I need 3 meters of cable to comfortably use the controller on my sofa. USB standards say that anything over 5m will not work properly. So in total there will be 6 meters of usb cable.
Is there a simple solution for this? I'm probably missing something very obvious

Thanks for any ideas