Best way to rig a tarp

[Kodaking]

Hello!

I am wondering how I should tie off my tarp with the tree. I have 2 loops made in the line that I use the links to connect the tarp to the line. So on the end I have a bunch of line(several feet) and when I tie it off I have a handful of excess line. While it's no big deal to have excess line after the knot, it is a burden to have to pull ten feet of line through a loop or knot. I need a secure knot(or hitch) or an adjustable one because if the line isnt taunt then the tarp will sag. I have pictures to show you. Lemme know if you want more. Thanks!