Apologies if I'm retreading old ground but I have a question about firing arcs and wound allocation.

I know that as long as one model from a unit is inside a firing arc then that unit can be attacked. However are models outside of the firing arc able to be allocated wounds?

e.g. AT-ST firing at a unit of troopers. The defending units leader is inside the arc, but the remainder of the unit are outside of it. Wounds are dealt, does the leader take the wounds or the whole unit?

Firing arcs don’t matter anymore when you are at the point of suffering wounds. You just need LOS to the minis that wounds are allocated to. Note that LOS and firing arcs don’t affect each other.