With the open end of the line that has just been put through the loop, go around the line that goes up to the glider and come back

Continue with the end of the line and go back through the loop we are coming from

Arrange carefully as shown in the last picture and pull tight

Voila! Brake line knot :)

When arranging the knot, take note of the position of the marker and arrange the marker to the position intended during the process of pulling everything tight.