To Map/Link eBay item with Shopify product, please navigate to the App Sidebar Menu → Ebay Items. Then eBay items are displayed as shown in the below table. In each row there is “Map with Shopify Item” button, click on this button to map that row eBay item with shopify item.   

    By clicking the “Map with Shopify Item” button, a popup will be open where all your shopify items will be displayed.    

    You can search shopify item in the popup and select the shopify item which you want to map with eBay item. And then click on “Add” button to map/link that shopify product with eBay item.