I did follow this Description (Scroll down to “Button Actions”) but i´m not sure where to place exactly the harbour-amazfish-script.sh Script:
I did chmod read and execute every group to the harbour-amazfish-script.sh file.
And of course the Button-Action for 4 presses is assigned to Custom-Script inside the Amazfit-App.
Btw. very good App, now under Sailfish OS my Amazfit GTS is finally working rock solid and did send a Donation for the good work!