Here's what I did when I cut my ridgeline.
First I pinned 2 safety pins to the ridgeline at an even measure between them, something like 8 inches. Tied a bowline on one end and put on the small quick link mentioned earlier. You'll need some extra cord to add back in the length lost due to the knots. Tie the cord to the other end of the cut ridgeline. I used double fishermans knot
to attach the 2 cords together. Then tie another bowline or loop in the end so when attached to the quick link it equals the right distance between safety pins.