bobt is correct. I used some thin wire from an old headphone set (in this case an old cell phone handsfree earpiece) as suggested in the original post. It was pretty tricky as I'm not the best solderer in the world. I had trouble 'tinning' the thin coated wires with solder at first but solved this problem by burning the end 2mm or so of the wires with a flame. (hold the wires in pliers with only the bit you want to strip sticking out the end or else the flame will take off down the wire and burn away more insulation caoting than you want.) Once I got the wires tinned with a little solder, joining then to the solder points on the overwrite head and the main board wasn't as hard. You just need a bit of a steady hand and a little patience.