Need help Listing in 'Spark plugs' category on ebay. - repost 2

Hi, My question is simple. I want to list multiple items in Spark plugs category. I want to know how and where to give the information about 'Item specifics' and 'Parts compatibility' such that my listings will show up as the product in the link- [login to view URL] I want to specify my Item specifics attributes and they should show up on the Description section under 'Spark Plugs'. NOTE: I know how to do this manually. Do not bid if you do not know how to do this for like 10,000 listings at a time. Will pay only if I get the right method.