Help to connect sony a6300 topixhawk4

Hello everybody, Now i worked with PX4 and meet next trouble. I can’t connect Sony a6300 to PX4. Network have some manuals for connect camera, but for another PX4 controller.
For connection used:
PNG

sony_ir_cable
how i can do camera shoot on ardulipot with this devices? Which configuration and pins i must use?
Used manuals:
http://www.tuffwing.com/support/Tuffwing_trigger_sony_nex_IR_pixhawk.html
https://docs.px4.io/en/advanced_config/parameter_reference.html#TRIG_PINS