Attach Particle Source/Target Within Actor

I have a lightning particle system that’s generated from a source-and-target. I also have an actor that I want to put the particle system in. I tried using the Vector Method for the source and target, but I couldn’t get it to work. I also tried using the Actor option, but that only works for actors in the scene and I want to attach both endpoints to certain spots within a single actor. Is this possible? Can/How can I achieve this (a unit with a particle as part of it)?