You'll be soldering to three test points on the PCB: 5V, GND and REST. They are located next to the plug for the PM1006 sensor and below the large capacitor on the PCB.
Solder a piece of wire to each of the following test points: 5V (red wire), GND (black wire) and REST (green wire).
Solder the 5V connection to the BAT+ pad on the back of the QT Py (red wire). Then solder the GND connection to the - (GND) pad on the back of the QT Py (black wire).
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