Click on your listings tab under your name in the upper right hand corner of the page. Your listings should be saved there for you to edit your photos.
If they're not there, then you need to claim the property as the agent. To do this, either type in the address or mls # to bring up the listing on the site. Once the listing appears, then there is a small tab that says "claim this home". The site will ask you to verify that indeed you are the agent. Then the listing will be available for you to edit photos, change the status, add copy, virtual tours and Open House times.
Hope this helps.
Prudential Connecticut Realty