First, if you are in a survival situation cut a sapling and fire harden a wicked point on the end by charring the end in your fire and rubbing it to a point with a rock. The result will be much better than ruining your knife.
To answer your question, take the leg tie-down off oyur sheath and loop it through the two holes so that both ends hang evenly towards the handle end. Place the squared off end of the pole along the topside of the handle, butting up against the handguard. Wrap the cord right and left cris-crossing around the pole and handle. Tie tightly at the base of the knife.
What you wind up with is a knife tied to a pole. It is only as good as your lashing and whatever pole you selected. I suppose such a thing would be good to spear an alligator or something. If I were in this situation I would make a fire hardened spear and save my knife for other tasks.
Here in Brazil there was a German man in the early part of the last century who made his living killing jaguars for ranchers. He had taken over 30 of them with a spear that limited penetration to the length of the blade, about 18 inches. He would frustrate the cat into charging him and then bring the point up and into the animal. He then had to hold the cat pinned to the ground so it wouldn't kill him while it was dying.
Once and animal has been pierced to the vitals it is better to leave the blade in where it will continue to cut. Arrows work better that way too. My brother once hit a deer through the shoulder blade. The arrow only penetrated to the center of the chest but the running deer shredded his own lungs and dropped in about 40 meters. Mac