For a bundle product M2E uploads images from the main (parent) product.
1) Description Settings
...
Main Image – uploads the largest image of your eBay item from the main (parent) product.
Super Size – displays larger, more detailed pictures (up to 800w x 800h pixels - 800 pixels on the longest side). This feature may come with an additional fee.
Default Image Url – if a product does not have the Main Image this image will be shown instead.
Gallery Images – adds up to 11 additional images from the main (parent) product. They will appear as small thumbnails under the Base large image.
Change Images for Attribute (only for Configurable products) – Not needed for Bundle products.
2) Bundle Product Settings
...
Main (Parent) product images
The image shows how M2E will upload product images according to the settings above.
3) Images on eBay
...
