Where this cable should go?

Hi I have a mouse cm310 ,I used to play with it easily ,now It stopped and and when I opened it I found 5 wires from the cable ,and 4 from the mouse(2black) .i found 1black not connected to anything and I think that's why it's not working but I can't find where to connect it ,I think it's the main wire because the led lights are on but the red light is off .I hope you can help me with that ty