The one I received from STP did have a loop on both ends. However, it doesn't make much of a difference. The lighter end (in your case, the one without the loop) goes to your backing. You can tie it on with a nail knot. The looped end (which is darker and should be thicker) connects to your leader. Some people like to cut the front loop off and tie their leader on with a nail knot, but it is just a personal preference issue. Personally, I like to have that loop so that changing out leaders is quick and easy.