Soldering the ESC should be fairly self-explanatory. The red wire from the XT60 connector goes to the positive (+) pad on the ESC, and the black wire goes to the negative (–) pad. The capacitor should also be connected to these pads—pay close attention to polarity.
The three wires from each motor are soldered to the three adjacent pads on the ESC. The order in which the motor wires are connected does not matter, as the motor rotation direction will be configured later in software.
If you are using a stack, the only remaining step is to connect the ESC to the flight controller using the provided connector cable. If your FC and ESC are from different manufacturers or are different models, make sure to verify that the pinout of the connector matches on both sides before powering up.
Quelle: Speedybee.com
All components come together at the flight controller. The radio receiver, video transmitter, ESC signal cable, GPS, and compass are soldered to the FC and later configured in Betaflight.
As a general rule:
It is highly recommended to consult the flight controller manual, as it clearly explains all pads and available connection options. This is shown here using the SpeedyBee F405 Mini as an example.
Quelle: Speedybee.com
Checking the voltage level of the pad you plan to use is mandatory. Before soldering, always verify what voltage the device can handle and choose a suitable pad on the flight controller accordingly.
3.3 V or 4.5 V pads are especially well suited for receivers and GPS modules, as these devices can then also be powered and configured via USB while the FC is connected to a computer.