...
On the Save () menu, choose Save & Close.
Step 8: Configure the cart thumbnails
If you have a different image for each variation you can set the configuration to use the correct image for the shopping cart thumbnail.
On the Admin sidebar, go to Stores > Settings > Configuration.
In the left panel, expand Sales and choose Checkout underneath.
Expand the Shopping Cart section.
Set Configurable Product Image to
Product Thumbnail Itself
.When complete, click Save Config.