For this tutorial, a lobster claw and large closed ring were used. However, you can use any closure you wish if you connect it to the chain in the same manner as shown.
Attach a jump ring in the upper and lower loop. Slide another jump ring through both jump rings on the heart and the loop on the closure.
Attach a jump ring to the upper heart loop and the large closed jump ring. Attach a jump ring to the lower heart loop and the large closed jump ring.