I installed a I-pilot on my Minn Kota Powerdrive V-2 , 12 volt. I want to install another battery for longer lasting with parallel wiring. I know the 5 amp charger I have will probably be a slow process, but, would like to try it. I have heard 2 ways of mounting the charger. 1st. , keep the charger mounted to the first battery like it was originally & it will charge both batteries, with the parallel wiring. 2nd one. , place the pos. cable from the charger on the first batt., & place the neg. cable from the charger on the 2nd. batt. , neg. terminal. it's suppose to charge both batteries. All items are new , & the batt charger is a Pro Mite 5 amp. Thank you, Don.