First of all sorry if this is in the wrong section.
So about a year ago i bought some logitech speakers.
http://www.amazon.co.uk/Logitech-Multimedia-Theatre-Speaker-System/dp/B0006LCMK4/ref=sr_1_3?ie=UTF8&qid=1367757499&sr=8-3&keywords=5.1
They came with this handy little adapter.
Pictures...