How do I use Physics Fields on Niagara particles?

The documentation suggests that it’s possible for a field system component to work on Niagara particles, but I am stumped on getting it set up. What I basically want is a volume placed in the world that pulls particles inwards. I know you can add modules within the particle system that add a point attraction force and such, but I need the force to be external. What modules do I need and is there any setup I need to do on the field system component itself? (besides checking the “World Field” option?)