Ohh and just so im clear on this... do i have the connections style right for 6v batts? THey do want to be in series right? And that does mean pos to neg and pos to neg and use one pole from each battery to connect the load?? Is grounding multiple things to one pole an issue? How about multiple terminals on the pos of the batt? I swear i have it all wired up really cleanly but idk perhaps im missing something, i mean besides the possbility that my batts could be dead. Does anyone know anything about these pro mariner charge controllers?