How to order my units to attack Power Cogs?

I'm doing like this:

var clockCogs =
ObjectManager.GetEntitiesFast()
.Where(
x =>
(x.ClassId == ClassId.CDOTA_Ability_Rattletrap_PowerCogs))
.ToList();

Since its not a Unity, I have to use Entity.

Then if I try:

myUnit.attack(cog)

It does not work.

So, how do I do that?

Edit: I think I'm using the wrong Class Id, but I could not find the unity Power Cogs, what is its class id?

I may be wrong but
ClassId.CDOTA_Ability_Rattletrap_PowerCogs it's ability, for ex you can cast this ability and so on..

Already casted power cogs may be something different.