DIY Tarp grip clips used to pull sides of tarp out. Removeable and moveable. Put them wherever you need them.
Tie 80lb mono to a quarter sized button using albright knot.
Place button on outside of tarp where you want tie out.
Push button through paperclip which is on other side of tarp.
I removed the inner bends of paper clip and covered with duct tape so there would not be any pointy edges to poke thru tarp.
Pictures show finished product, product deployed with mono loop ready to attach line to, product deployed seen from inside tart and the albright knot.