What does BC mean on a PCB terminal?

[robzy]

I pulled apart one of these: https://www.jaycar.com.au/compact-switchmode-laboratory-power-supply/p/MP3800

And I can't quite remember how to reconnect the 2 output terminals.

The PCB has three terminals in the same place: +, GND, and BC GND -.

Coincidentally this video by Clough 42 shows a circuitboard that also has a "BC-" terminal:

What is the BC terminal for? What does it stand for?