Wiring Up Receiver Boards

I have a Spektrum DSMX receiver board which I’m trying to wire up to a mini F405 mamba. The ports are PPM, SBUS and RSSI. Which port do I wire the signal cable to and what is the voltage, 3.3 or 5. Many thanks, regards

You wire it up to any rx pad, or the SBUS pad if u want. I think 3.3v is the suggested voltage, but 5v should be fine (never used spektrum, so i dont really know)