On the Honda RS125 I bought the QS unit has no evident identifying marks and needs the sensor wire if it can be sorted. Sensor wire presumably plugs into shifter linkrod at bottom per the pic: Connector and wire coiled on top fork clamp. Unit might take power at coolant sensor?
If it is a battle shifter, here is a link to the instructions. http://www.risingsuncycles.com/images/PDF/Battle_Shifter_RS125.pdf