If you are a licensed client, or have your own security certificate, you will need to enter the URL to your certificate as outlined above.
By default, Pinnacle Cart only secures the credit card page during checkout. If you want to secure the entire checkout process, login to your admin area and go to Cart Settings >> Global Cart Settings >> Security Settings and change Security Mode to "Complete".
It is important to understand that Pinnacle will only secure images that have been uploaded through the cart system. If you have images in the order track that are called from other sites, or haven't been added through the system, you will need to make sure these images are secure to prevent any browser errors during checkout.
