How do auto load weapons

[Freewolf]

So I am trying to create a new NPC monster that can be loaded up in an encounter builder. However I am not finding the place to put weapons that I want to show up every time I load this creature up.

I can see that in the standard MM races like hobgoblins and such, but I am failing to figure out how to replicate this.

So I want to be able to load my monster into and encounter builder and have it prepopuated with like a long sword and shield. Where do I put that?