I am trying to do this off the top of my head without a sample game running local, but I believe this setup should get you going…
You will need some variables for your Beam Source, and Beam Target…Depending on your game I would handle it something like this. I included cast to character and cast to skeletal mesh to show you how you can get the socket location by casting…I don’t know your specific case so you’ll have to experiment.
If you do a trace to a position in space, you can store that as a vector variable and make that your BeamEndPoint as well…