I included one in my MS0006 review:
https://www.autoflower.org/f147/grow-northern-ms0006-led-us-customer-27812.html
I switched it out though and no have an S hook in each of the 4 corners I then took 2 pieces of chain (one for each side) took the ends of one piece of chain and connected two corners. The middle link in the chain then has an S hook that attaches to a rope ratchet hanger so the side can be independently lowered or raised.
Let me know if that doesn't make sense and i'll snap a couple pics of it.