i just got a 16 foot landow jon boat with a center console and 20 hp evinrude. the boat does not have running lights,the question is what side of the boat on the bow does green and red go? and what side of the boat does the rear light go or does it matter? also if you take two batteries and tie the pos to pos and neg to neg is it still 12 volts or does it make it 24 volts??