I’m not sure anyone has made a “body map” of Caesar’s body per se (though if someone can find one that would be great) - the Roman writer Suetonius gives a fairly vivid account of the assassination which describes where some of the wounds exactly were so I will just relate the exact point of Suetonius for you as (to the best of my knowledge) it’s the most comprehensive of the actual moment of the assassination - since most of the other writers just focus on who the conspirators were, their motives and the aftermath - whereas Suetonius actually tells us about the stab wounds (though bear in mind he is not a contemporary source and so his understanding would come from researching earlier writers that we likely no longer have).

Suetonius, Julius Caesar, point 82:

“As soon as Caesar took his seat the conspirators crowded around him as if to pay their respects. Tillius Cimber, who has taken the lead, came up close, pretending to ask a question. Caesar made a gesture of postponement, but Cimber caught hold of his shoulders. “This is violence!” Caesar cried, and at that moment one of the Casca brothers slipped behind and with a sweep of his dagger stabbed him just below the throat. Caesar grabbed Casca’s arm and ran it through with his stylus; he was leaping away when another dagger caught him in the breast. Confronted by a ring of drawn daggers, he drew the top of his toga over his face and at the same time ungirded the lower part, letting it fall to his feet so that he would die with his lower body decently covered. Twenty three dagger thrusts went home as he stood there. Caesar did not utter a sound after Casca’s blow had drawn a groan from him, though some say that when he saw Marcus Brutus about to deliver a blow he reproached him with the Greek “you too, my son?”. The entire Senate then dispersed in confusion and Caesar was left lying dead there for some time until three of his household slaves carried him home in a litter, with one arm hanging over the side. The physician Antistius came to the conclusion that none of the wounds had been mortal except the second one in the breast. The conspirators had decided to drag the dead man down to the Tiber, confiscate his property and revoke all his edicts, but fear of Mark Antony the consul, and Lepidus the master of horse, kept them from making their plans good.”

Plutarch’s Life of Caesar gives a very similar (though less detailed) account but also mentions some other details: that Brutus stabbed Caesar in the groin, Casca’s wound did not penetrate deep because he was hesitant (striking first) and that many of the assassins were wounded themselves as they tripped over each other trying to get at Caesar. Both conclude with twenty three stab wounds but Suetonius mentions the autopsy report from the physician that concluded the breast wound was the fatal one.

So we have 3 specific stab wounds mentioned:

1. Casca’s to the neck that hit just below the throat - which did not penetrate deep.

2. The blow to the breast - which the autopsy concluded to have been the fatal one.

3. Brutus’ blow to the groin.

The other twenty wounds to the best of my knowledge are unknown which would make sense given the messy circumstances and the nature of our evidence - it would be common knowledge who stabbed first: hence why they are able to determine Casca’s wound to the neck.

Brutus’s stab to the groin would likely be remembered since he was considered the most infamous of the assassins (though Plutarch does say “some have said” which suggests uncertainty in the historical tradition he is using of exactly where Brutus stabbed him).

And the blow to the breast would be known because the autopsy concluded it as the fatal one.

Hope this helps!