How to fill a crate with objects coming out of the conveyor?

I am following this tutorial: Making a Simple Converyor Volume | Live Training | Unreal Engine - YouTube

to make a simple conveyor volume

however, I want to know how to let these boxes come out with specific pattern and get packed in a crate let’s say when they reach specific number?

I appreciate your help with this.

Thank you.

@Erytriel
@Fotosynthesis
@ND_Dwight
@TestyRabbit