How can I use a portal to travel to specific locations in the new level?

Here I show my current attempt. I think you can tell I’m guessing. First I created a Boolean in the Blueprint Actor after overlapping a CollisionBox:

Then in the OpenLevelBlueprint after EventBeginPlay I tried to determine a location when the Boolean is ON:

But it’s not working. It was just another attempt.

I absolutely don’t know how to reach my goal. The pictures from user EvilCleric look competent, but I can’t implement it.