I tried to zoom in on the picture but it just made it blurry BJ, but the string was tied by the cap and then we just started wrapping it near the bulge at the bottom of the bottle so it would help keep the line on. Then we used 2 gear ties to attach it to the bow. Pretty simple set up and it worked great. Man even shooting at stingrays sitting on the bottom was hard to do. We basically had to aim about 2 feet under the bottom edge of the ray lol.