Navio+ Motors Order Sequence for Quadcopter

What is the motor sequence that the Navio+ pins (1-4) expects?

Is this one?

3 1
\ /
/
2 4

Or is actually this one?

2 1
\ /
/
3 4

If you are running Arducopter, it is the first one. Navio+ is ‘only’ an IMU shield, most of the information in the Arducopter wiki is valid for Navio+ too.

I think this will be helpful