point number 7 in your diagram which point to generator (called stator) is a single wire generator which pukes hot current generated by it (its functionality is simple just like our Bicycle Dynmo) other wires which you said before are for ignition and CDI and pulsor e.t.c..
Your battery and over all bike is made on working on low amps putting a 35Watt head lamp on a battery directly will kill the battery very soon, becuase the generator it self which charges the battery will not find time to charge it properly...
If you increae battery size then generator will never be able to charge it fully. its Junoon which you wan to alter right ?