So I bough a VMA421 water pump. It only has a female DC connector which I intend to connect to a power supply. However, the connectors polarities are not specified anywhere. The only information is that “red is +, black is -” on the sticker on the side of the pump. Does anyone know which wire is connected to what in the DC connector itself? I’ve heard of nonstandard polarities which is why I don’t want to risk connecting it in a wrong way. The alternative I see is cutting off the connector and checking, but I would like to avoid doing that.