How about using an actual human rather than someone's artistic impression of one:
Here is a side view of a male standing straight up:
Here he is with a 2 degree forward lean:
These impressions were created by the 2 FBI agents, O'Neil and Siebert, who attended the autopsy, took
notes and wrote a report about what they saw and heard. They were drawn independent of each
other for the HSCA. They show the location of the wound in JFK's back and the one in the front of his neck.
They illustrate the reason Gerald Ford needed to changed the discription of the location of the back
wound to the neck to accomodate Arlen Spector's SBT.
Could you explain what it is you're trying to convey with the arrows through the model?