The only place that you're guaranteed to see it is if you look at the photos tab in Google maps for your listing. However there's no way to guarantee which photos will show up as the main photo in Google Maps or in the knowledge panel.
I do know that Google doesn't really like logos and other pictures that don't depict real scenarios such as employees or shots of the office or the outside of the business location.
New advertising option:
A review of your product or service posted by a Sterling Sky employee. This will also be shared on the Sterling Sky & LSF Twitter accounts, our Facebook group, LinkedIn, and both newsletters.