PWM outputs

I’m having trouble understanding the connection between actual PWM outputs and the virtual PWM channel numbers which you can use in Mission Planner. An examaple I’ve seen shown uses SJ0, 1 and 2 on the big connector to control Gimbal Roll, Gimbal Tilt and Shutter. What do I do if I use a gimbal which has all 3 degrees of freedomn, roll, tilt and pitch. I suppose I use those 3 outputs on the big connector, but then what do I do about the shutter?.

If I am making a hexacopter, does that leave outputs 7 and 8 of the main 8 pwm outputs free to be assigned elsewhere?. Sorry to be so vague, but I am still waiting for my 2.5.2 PCB to arrive, and none of the interesting parts of mission planner are available or activated until the hardware is connected. Also, I can’t find much in the way of documentation.

Thanks for any help people can offer, I’m probably missing something obvious.

Pierre

@phodges,
Have you read these two sections of the Wiki on using camera gimbals: copter.ardupilot.com/wiki/common … ilization/
If you have, could you please explain in more detail your issues with the Wiki instructions.
Regards,
TCIII ArduRover2 Developer