I recently disconnected the PAS on my Ecotric 20” Fat Tire Foldable bike (36v - 500w). I did this by disconnecting the red, green and black wire at the plug located at the controller. I would like to hook up an on/off switch so that I can control when I want to use the peddle assist. My thought is to plug the wires back together and then cut one of the wires. From the cut wire splice on two new wires to extend over to the a switch on the handlebars. So, my question is, will this work without damaging the controller unit and does it matter which wire to cut into (red, green or black)?