In this step I will add a battery and switch.
If using a switch with three pins, we only use the two, and they must be close to each other.
The connection to the XIAO ESP32-C3 is done via it's battery pads that we can find beneath the XIAO.
Connecting the battery to the XIAO ESP32-C3 via it's pads allows for the battery to be recharched with the USB port of the XIAO.