Quote by The Rambler
It’s impossible to say without knowing your exact setup Markbox, but generally the negative terminal of the battery will do the trick. If your battery is tied to chassis ground then you could connect to that and charge your battery no problem. But if you have any kind of battery monitor in place that uses a shunt resistor, then you would want to connect your charger to the chassis and not the battery negative terminal. In that scenario, it’s not that your battery wouldn’t charge, it’s just that your monitor wouldn’t register the incoming charge current and would not sync correctly.
Thank you so much.