Hairworks collision capsules

Hello everyone, I’m currently working on hair for one of my characters and encoutered something I just can’t seem to figure out. I am trying to create collision capsules because hairworks doesn’t seem to do this alone. I checked the samples in the nhairworks viewer and noticed the capsules. My big question is, how am I supposed to make them? is there any tutorial explaining this? I saw the 3ds max tutorial but the only thing that it’s mentionned it is to add the growth mesh to the collision in hair and fur. I am truly lost atm and I would love if anyone could give me a hand with this.

Check this video out:

Collision shapes are added in the HairWorks modifier (3dsMax).