GoPro Dual HERO System Mode D'emploi page 6

/ Assembling the Dual HERO System
Step 1
Open the housing backdoor.
IMPORTANT: To prevent damage to the Sync Cable, please see REMOVING SYNC CABLE FROM CAMERAS
section before attempting to unplug.
6
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Step 2
Insert right (primary) camera
right side up into housing.
Step 3
Insert left (secondary) camera
upside down into housing.