How to nest one Blueprint inside another

I have a SpectatorPawn BP inside of which I have a candle prop locked to the camera providing the player illumination moving through a cave. I had somebody else do this work, am less familiar with how they set things up, but I’m now seeking to modify some things. Elsewhere in the game there’s another Blueprint of the same flickering candle, the key difference being that this BP features better lighting effects, has randomized flickering behavior, whereas the lighting in the SpectatorPawn is static.

I can drag the BP of the flickering candle into the SpectatorPawn BP, compile, and in play mode see what I expect to see, with the exception that when I then navigate this flickering candle BP stays behind. How can I lock it to stay with the camera?

In Event Graph I see the nodes configured in a way I’m sure relates, have attached a screen capture, thanks big time for advising how to lock this improved BP to the camera.