When you're taking the U-Bahn (U3 or U6) coming from Munich city centre then enter the train at the end for the shortest possible way to the HUB. Take the escalator opposite to your direction of travel. At it's end you should see the situation as on the below image.
Turn right in the direction "Implerstr., Lindwurmstraße, Exit B". Here is the next orientation picture:
Walk up the stairs and you should see a Penny supermarket to your right.
Due to construction work the short way to the HUB can't be used. So turn 180° when you reached the ground level and walk southwards
Then walk down the street until you see the house with the archer. Turn left there into the Kyreinstraße:
At the end of this street turn left again into Gotzinger Straße.
Walk down the street towards the yellow building on the left.
The entrance to the hub is the second door.