The Entrance Wound in the Throat, the Front Shirt Slits, and Tie Knot Nick

[Joffrey van de Wiel]

There is no reason to guess at the location of the anterior neck wound. The autopsy protocol (CE 387) clearly states on page 3:

Situated in the low anterior neck at approximately the level of the third and fourth tracheal rings is a 6.5 cm. long transverse wound with widely gaping irregular edges.

This image might be helpful: