Sorry I missed this earlier. You will need to connect the FMU PWM line as well. I'm not sure what settings you're referring to - Once you've used QGC to tell it the basic configuration, set up your radio channels including an arm switch, and then calibrate the ESCs. After that the motors should work. When you switch it on you should get the happy sound, then you need to press the safety switch on the GPS unit until it double-flashes, then you should be able to arm it.