The Old Senate Chamber S1|01 Room 707 is located on the 7th floor of the administration tower, which is part of Karo5. There are two ways to get to the staircase/elevator of the high-rise building:

Option 1: 1st floor

On the 1st floor of the tower there is a sliding door that leads out to the level of the canteen (by the call-a-bike station).
If you enter the high-rise building through this door, you only have to take the left or right corridor into the stairwell in the middle.

Option 2: Ground floor

On the first floor of the Karo5/Audimax building, head towards the toilets into the corridor that leads to the other administration rooms. Here you will find access to the elevator/staircase.
Once on the 7th floor

Once you have reached the 7th floor, you have to turn twice to get to one of the two access doors to the hall. If you are standing in front of the kitchenette, you have turned in the wrong direction.