I should have made a drawing right away, here it comes:
The chest harness is very basic on the drawing, similar to a jacket.
The wrist tie is a separate rope, the loop includes the lower strand of the chest harness, it can even include both strands, if the harness is lose enough. It really depends on your dexterity, since including the upper strand will pull up the hands a lot.
The wrists go through the double loop, one from each side, on the picture, one hand will point towards the viewer of the picture, the other one into the screen.
On this specific tie, it will be easier to cut the chest harness than the wrist tie.
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And here the hogtie:
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Here, the blue rope is the same method as the wrist rope on the other tie. Of course you need to pull the end, that goes through the knot, not the end that creates the knot. Wrist and leg ties can be fairly lose, because they will be chinched a bit by the connecting (blue) rope. Alternatively, you can bind legs and hands firmly with their own ropes and simply make a connection with the blue rope.
I hope, this makes it clearer. At first sight, a simple slip know might look like not enough friction, but a triple loop for the first method, with soft 10mm rope was hard to wriggle out of, and four loops were really painful.
For the hogtie, you have to consider the extra friction from leg and wrist ties, therefore I had the idea to connect the blue rope to the ties with rings instead of leading it through the ties.