With my discount it says 50% OFF + FREE SIMPLICAM + 2 months of monitoring

So I get a code to get a free SimpliCam do I have to add it in my cart then does it automatically  take off the price or do you guys just send one through without me adding it in the cart or does it automatically put a free camera in my cart with the rest of my system that I’m going to purchase the base and the other cameras and sensors im buying all it together by building my own system a example of what I’m saying is at the top of the screenshot.