The battery light, or rather the charge warning light is a blue wire that runs from the alternator to the dash clocks, when stationary the alternators IND terminal is EARTH, once running and charging this IND terminal changes to live sop putting out the warning light, the other side of the light(bulb) in the clocks is a live from the ignition switch(pos 2).
This light will in no way affect the starter or engine running.
tabetha