Originally Posted by beep
It reminds me of the "old" RL tarp suspension from Opie. There were 2 "offset" toggles that were prussiked to the RL and went through the tarp d-rings. The centered "toggle" was used at the fixed end. The adjustable end of the RL was usually handled by a figure-9 prussiked to the main RL.
I don't know if that helps. It seems to me that you're missing some pieces/parts.
You got it Beep, it seems to be the original whoopieslings.com continuous ridgeline setup.
I had a version of that when I first got started. Here are a couple of shots of it in use on the tarp that I had at the time.
I hope this helps the original poster.