Lets see if I can explain this clearly. First, you need two eye bolts on the back of your sled/shack to attach ropes to. Then, cut a 2' piece of 1 x 2 or 1" PVC. Drill a hole in the direct center of it and another hole just in from one end. From the center hole, run a piece of rope through and knot the end. Leave about 5' of rope and tie a carabiner on the other end. Then, from the end hold, run the rope the though, knot it, then leave about 7' of rope. Tie that rope to the carabiner as well.
Attach the carabiner to the eye bolt. Drill two holes behind the shack. Drop the anchor into the hole on slack rope. Tighten up the tension and the anchor flips flat against the bottom of the ice and is a rock solid anchor. Slide the shack to tighten up the tension, drill your fishing holes, and you are anchored for a hurricane. To remove, just loosen the ropes and let the anchor off the bottom of the ice. Pull up on the longer rope and the anchor snakes up the hole. Really simple and reliable. Just wrap the rope around the anchor and throw in the sled. I have been using this setup for years and it is by far the best I have used.