Kevin, there is no magic in pulling the target onto the slit or hole. I just use the standard The Sky X autoguider. I set the center of the hole as the guide star position. Then once the star is placed close to the “hole” by the finding process the autoguide is set going. It assumes the closest object is the guide star and guides it on to the hole.
I am looking at “bright” stars so they are always the only bright object in the guide field. I have to take very short exposures so set the guide settings very “loose” so as not to chase the seeing.