Sparkfun macht das ganz clever: Sie verbauen den Cap haben aber in der Verbindung einen solder juper den man kappen kann, wenn der zweite channel eingesetzt wird:
siehe Qwiic Scale Hookup Guide - SparkFun Learn
Channel 2
The NAU7802 has a 2nd, optional ADC channel that has a much lower input capacitance (5pF vs 14pF) but is otherwise identical to the 1st channel. By default, this channel has a 330pF capacitor across its inputs. This helps reduce noise on channel one. If you’d like to use the 2nd channel, we recommend removing the capacitor by cutting the CAP jumper.