Since the HomeKit link code is not currently visible on the instructions and on the back of the product (available later in the year), you can find it in the Somfy Protect application. Your equipment should be installed and connected to your box’s wireless network to retrieve the HomeKit link code. Go to the "Settings" menu, then select "Apple HomeKit" in your Somfy Protect application. Then press the product listed on this screen and the HomeKit association code will appear.
You can download the code and it will then be saved in your photo gallery. You can then print the HomeKit link code or display it on another screen in order to install your camera with HomeKit.