There are explanations with photos around but I don't have a link. I cut the end of the line at a sharp angle with a double-edge razor blade. I then overlap or double the line on itself. I want the beveled edge against the main line to minimize the bump. I overlap the line maybe 1/2 inch and try to create a small loop. I tie a slip knot in the end of my fly tying thread on the bobbin and put it over the doubled line. This holds the loop together when I tighten it down. I hold the looped end and the main end and spin the bobbin around and around wrapping the thread over the area. I use a piece of loop mono under the last 10 wraps and pull the tag end under. I coat it with sparing amounts of aquaseal.