Connect and set up a GoPro interface cable
There are two wires on the GoPro interface cable, these need to be connected up as shown here:
The GoPro must be set up in "1 button mode" so when it turns on it begins recording automatically.
After connecting up the cable the configuration software will need to be changed to set the status output up correctly.
Using the DL1 MK3/CLUB configuration software, select "Output Drivers" and enable GoPro Status on output 4: