How to install the BCDC1212T trailer battery charger

Want to install the REDARC BCDC1212T 12A trailer battery charger to charge your auxiliary trailer battery to 100% state of charge while on the move? Follow this helpful DIY guide to safely and effectively install this charger with all battery makes and chemistries, including Standard Lead-Acid, Calcium, Gel, AGM and Lithium LiFeP04.