To tie the rope to the anchor point I'm going to use the bowline knot, it's quite secure.
the position of the rope depends more on you, you need to test and see what works best, for me personally, I managed to block the carotid arteries by leaving the rope above the Adam's apple and very close to the mandible.
I will use this noose:
How to tie a slip knot with illustrated and animated examples
www.netknots.com
Bowline: