Niagara and Actors

How can I get coordinates of any Actor on the scene and transfer them to the editor of Niagara? I tried to look for variables that would be of this type (Actor) in Niagara itself, but found nothing. Maybe there is way to write a location to Vector and then send this data to Niagara-editor? I want to do this, and on BP I found function “Set Niagara Variable (Vector3)” - it takes name of parameter (which you need to create in advance in emitter) and Vector 3, i.e. something that just needs. Attempt to assign coordinates of Actor failed, at least for me, since the variable in Niagara simply remains equal to zero under any conditions.

If someone has advanced in this matter, then direct me to the right path! Thanks.

I would look up exposed (user) parameters in the niagara editor and edit them in blue prints. If the actors are moving it may require event ticks