WEIPU SA20 Connecter for 15A DC OUTPUT

So, this output connector is the is the mail version of the (female) that is on the PV input. Note there is a red dot that lines up when making a male-female connection and vice versa. My question is Which pin (2 pin in each) is POSITIVE, and which pin is NEGATIVE relative to the AC200 pins?

I would verify with a meter myself rather than count on getting it right through descriptions. Just my two cents.