I use two carabiners, one attched to each handle at the end of my kayak. Between them os a clothsline arrangement with a third carabiner. This third one is attached to the clothsline so I can move it to the front, rear or middle and it is where the anchor line passes through. Finally I have a cam cleat that the anchor line runs through and us used to hold the end of the line. Do not tie it down in any water with any speed at all. You do not want to get swamped and this can happen easily if you are not careful. That is why the cam cleat is so much safer.

jed