This plugin is an extended version of Categories Images.
The Categories Multiple Images Plugin allow you to add unlimited amount of image to a category or any other taxonomy.
You can use:
to get the direct image url and put it in any tag in your template.
Also from settings menu you can exclude any taxonomies from the plugin to avoid conflicting with another plugins like WooCommerce!
More documentation
https://github.com/Binternet/WordPress-Plugin-Categories-Multiple-Images