To remove or replace the image in the snapshot banner, follow the steps below:
Go to Administration tab > Customize > Sales > Snapshot banner
Click on the source code icon < >
Remove the 'img src' and replace it with the source code of your image.
To get an Image source code; click on the image > right click on the page > select Inspect > under Elements, you will find the image src code > adjust for height and width and paste into the snapshot template