To attach images to your existing auctions, click the Image Hosting button in the lefthand navigation bar, and select the image(s) you want to attach to your listing. Click the "Attach" or "Attach with Counter" button at the bottom of the page. On the next page, select eBay** from the drop-down menu, and click the "Existing Auction" radio button. The next page will require you to enter the auction number (you are required to have your eBay ID information on file to use this method.) Keep in mind that your image(s) will appear beneath the ad template on the auction page if you use this method.
**You may also select "Other Auction Site" from the drop-down menu, which will produce the HTML code that contains your image links. You would copy/paste this code into the listing revision form on whatever venue you are using.