I really can't tell the size from that picture.. de-solder wire and cut it count strands.. and micrometer size... there's international charts online that will give you what size ... you can always use a thicker gauge wire then use the amount of stands that will fit in pre drilled hole. but b4 that you could cut a little more insulation off then finely solder all wire together and slide heat shrink tube over exposed wire( you can even repurpose a piece of wire if you have a old dead piece of electrical thing old pc ..so on)