That trailer does have a tongue. You are missing the coupler.
As mentioned above, there are a couple of options on replacing it. You can replace to stock with a surge brake system or get a standard A-Frame coupler (ball hitch) and install it. The second items are easy to find on ebay or local trailer shops. Have seen them in wally world a time or two as well.
EDIT: If you got that from the Fbx GL lot, Tony may help you install in the yard. He's real good to work with and permits working in the yard. The ball couplers are available from 6 robbers on South Cushman and White Spruce for sure. I've seen them at Lowes and Wally, but they are rare there.