Video of my kite bridle, not fully set up due to a broken spar.
The clip shows the connection to the upper leading edge with an adjustment knot, the connection to the center, and then to the lower leading edge, and out to the leader line. Finally, the short LE tension line.
https://photos.app.goo.gl/fZywNEbrnW6822LW6
My own modification was melting a hole in the end cap and threading it through the tension line so it doesn't fall off or get lost.
I think you are referring to the leader line. Connect your flying line to it.