Under the glass cover there is a dip switch it’s job is to define the buttons mode (Using the included pin).
Disassemble the glass and continue by the instructions below.
Every pair of outputs = shutter.To enable – turn on the correct the shutter mode dipswitch.
Turn dipswitch 1 ON – channels 1,2 will be shutter.
Turn dipswitch 7 ON – channels 5,6 will be shutter.