Which MC-4 connector is the positive connector?
Positive polarity will be identified by a male MC-4 connector it will also have a red 0-ring indicating its positive polarity.
Please be advised that MC-4 connectors will connect to each other to produce a waterproof seal, a male connector must
be connected to female connector, however, this will not reverse polarity. You must always follow the polarity as it is
indicated on the solar panel.