Get some speaker wire at your electronics shop or DIY center (no Home Deopt over there, eh?). It's going to be two seperate wires moulded in the same cable. Cut it just a little longer than you need, split the ends apart as much as you need to attach the wires, strip the ends a few cm back, twist the ends tightly and insert into your connectors.
Be carefull not to have stray wires hanging out of the connectors.
Also, be certain that end you plug into the the red or + is the same on both ends. You don't want to have the wores crossed so it's + on one end and - on the other. it won't explode or anything but it won't sound great either.
CW