You won’t be able to drag it in, what you need to do is drag off the “Other actor pin” from the overlap node and Cast it to your textrender actor then use a “get node” from this actor to get a refence to the component you want to change the visibility of. You could use the “other component pin” the component you are overlapping with is in fact the one you want to set visible, however because it is invisible it will be hard for the player to find it to overlap with in the first place.
If you can screen shot, you’re blue print for the Textrender Actor, I can help you set up a custom event that will make this a lot easier to do.