Brake light switch (rear brake / pedal)

Hello, I recently bought a used Z125 and the brake light only comes on when I pull the front brake lever, but not with the rear brake pedal. I looked and the switch is there, but the wires aren’t plugged into anything. For instance, the green wire is just hanging out near my battery. I can’t figure out where these plug into. Can somebody help me locate where these wires are supposed to lead? Thank you.
(The cables I’m referring to look like the ones in this picture, not plugged into anything)