As best as I understand it:
1 point for kicking the body armour
2 points for spin-kicking the body armour
3 points for kicking the head
4 points for spin kicking the head
Kicks to the body are registered with the electronic system, while kicks to the head must be agreed upon by the three judges.
The referee can also award penalty cards for various transgressions (attacking when an opponent is down, falling over to prevent an opponent atacking, going outside the area, etc.) If enough of these cards build up points are awarded to the opponent.