I'm building a teardrop trailer and just installed a Victron 100/30 solar controller. I'm asking where the ground screw should be connected to? I'm using a Blue Seas bus bar where the battery + and - go to, the solar panels + and - go to and the battery charger go to. I'm wondering if the ground screw on the solar controller can go to the neg bus bar, as well? Thank you. Please ask for any additional info. Appreciate the help.