Step Down Converter - Ground or Negative?

So I bought a DC Step Down Converter (DC Converter 48V 36V 24V 50V Step Down To 12V 3A) to power lights, usb charger, etc. I am confused though.

The connectors are V+ In, Ground, V+ Out. Is Ground the Negative in this scenario?

Yes! ground in negative.

thank you sir

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