01) Access the Control Panel
02) Click on Catalog >> Image Options
03) After adding the attributes and values according to the tutorial
04) In the option (Select an option category to edit) select the desired attribute and click on the button EDIT
05) Click the attribute value row to select >> After clicking the EDIT button
06) Choose File to upload and click the UPDATE button
07) At the bottom you will have the option (You currently have Options as Images enabled for the following options categories) select the checkbox of the attribute where you inserted the image and click on the UPDATE button to activate the option with image to this attribute.
On the product page the image will appear in the Attribute value field for the user to choose.