I have a 2013 Heartland North Trail Caliber 22FBS. I am towing with a 2015 RAM 2500 4X$ Crew Cummins Diesel with built in trailer brake. I have four options for setting the trailer brake: Light Electric, Heavy Electric, Light Electric over Hydraulic, and Heavy Electric over Hydraulic. Which should I use to pull this trailer with my tow vehicle? Thanks.