What is the pin number # of APM 2.8 inputs pins (1 ~ 8)?

Hardware UnSupported hardware
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I’m referring to this image:

What is the pin number # of APM 2.8 inputs pins (1 ~ 8)?

#define PIN_AUX_4 ???  // what number I should put here?
#define PIN_AUX_3 ???
#define PIN_AUX_2 ???
#define PIN_AUX_1 ???