The headlight have 2 extra wires, red and green, other than the main headlight wire. I need to know where to plug in these wires into the original wiring harness of the bronco.

The red wire of the WH Revolution LED Headlights - Chrome w/Halo, 7" Round, 66-78 Ford Bronco can be tied into the park light circuit. Meanwhile, the green wire can connect to each side's signal circuit, enabling the halo 7 inch LED to flash with the signals when activated.