I measured my hydra bridle and all of the dimensions agree with the figure you posted. The dimension of the loop on the ULE pigtail is missing – it is 68mm. The figure can be confusing if you are new to this. I will try to add some details – I hope it helps.
The bridle consists of three sections. One that is tied to the spine at the center T and then continue to each of the tow points. The other two are identical, one for each side of the kite, and go between the two leading edge connectors. These sections are actually each in two pieces with a pig tail at the upper leading edge connector to allow you to adjust for wind conditions.
Look at the point where the three bridle legs come together. You will see an overhand knot and a larks head knot next to each other. The overhand knot is on the center T bridle section and the larks head is in the section that goes between the two leading edge connectors.
The center T part is on very long piece (almost 3.5m). It consists of a loop at the center that is 38mm long (this is the part that connects to the spine). There is a knot that is 584mm from the tip of the loop on each side. This is the knot where the three legs come together. There is another knot at the end of each side where you connect the flying lines – the tow point. The exact length to the tow point isn’t critical, but it is critical that it is the same on both sides.
Now look at the upper leading edge (ULE) connector. You will see a pigtail looped around the connector with two knots in it. These are the knots at 83mm and 105mm. The loop is 68mm (the missing dimension). Again, the knots are measured from the tip of the loop.
The other part of the section that goes between the two leading edge connectors has a knot at one end and a loop at the other end. The size of this loop doesn’t matter – this is the loop that uses a larks head to connect to the pig tail. The mark at 584mm is the center of the larks head knot that connects this line to the center T connection.
I hope this helps and that I didn’t add more confusion.