So I'm at my mother in law's house and I found a wired Guitar Hero 2 Explorer Controller for the Xbox 360 that she's letting me have. However, the end part of the cable is round. I believe it's missing the other really short adapter that goes from the round part to USB, kind of like the original Xbox controllers. (really stupid design flaw if you ask me, these things go missing like crazy)
What do I call this adapter so I can order an extra one online?