you want to disable the hardware safety switch?
if so, you have 2 options:
1.in QGC, in parameters you can disable the IO_SAFETY option
2.you can connect your motors to the aux outputs and not mains
warning: it is dangerous to disable this option...
if you want to arm the vehicle by the combination of 2 sticks (↘↙) , you need to add logical condition in the code
lets say "↘" this is channel1 radio , and this is "↙' channel2, then those signals correspond to pwm input you get from the radio, so all you need is to add im simulink: "if channel1 pwm>pwm1 && channel2 pmw>pwm2, ARM=1 else ARM=0" and send it to pwm block