Scenecapture minimap - Adding meshes or textures?

Hi. I’ve set up a minimap in my 2D spaceship game by using an actor with a camera with “scenecapturecomponent2d”. Now, I’d like to spawn and attach a very bright mesh to all the enemies which only this minimap camera can see.

Problem is, I can’t figure out how to do it because if I just spawn an actor the camera will not be the owner, so the “only owner can see” won’t help. I also tried using the M_Highlight blendable thing from the content example but it’s not big enough to see in the minimap, no matter how much I try to edit it.

Is there perhaps some way to set the owner of actors in blueprints?

Maybe a better way to do it would be to add textures to the minimap UMG itself, but I have no idea how to calculate the world space vectors to the widget transform coordinates.