What's the proper spelling of the attack, walk etc. animation ?

In the editor, we can see there are several attack and walk animations for the units. By using triggers, I want to set a certain unit to show only the 2nd attack animation (attack 2) while fighting. But it doesn't show even I enter 'attack 2' in the value box. So what's the proper spelling for these ?

In WE, select a unit and look to your left. There should be a grey box with that unit in it. Press the < and > buttons to cycle through the animations. Those are the names for that model.

I know....As mentioned in my post I said I entered 'attack 2' according to the animation name shown there. But my problem is, it didn't work. (while the 'attack' animation worked) So I wonder if there's a proper spelling method when enter the 1, 2, 3 etc.

I've tried attack2, attack_2, attack-2, and attack 2.....all failed

So what are you trying to do? Make it so that every attack the unit does, it plays Attack 2?

Yeah that's what I want :(