Hello there, I recently bought a Bultaco cross motorcycle 1970 Sherpa S model.
 
	It has three wires running out of the engine left  cover and it goes directly to a red box which I assume is the starting coil because it goes to the spark plug cap. So here it goes, my question is if I can install a headlight and a back light without modifying anything inside the engine.
 
	I thank you in advance for any reply, Jaime.