Massively off topic, sorry.
F1 stopped using the Nordschleife in 1976 after Nikki Lauda crashed between Ex-Muhle and Bergwerk. That section is now known as the Lauda Links.
The top of your head is confused. lol
The complete circuit was built as the Nordschleife and Sudschleife. The Sudschleife was a 4.7 mile circuit used mainly for testing. The complete 17 mile circuit was only raced on a few times I believe.
On the map you can see the two long straights between North and South loop. These were part of the Nordschleife race circuit and the space between used as the pits. The current GP/24hr pits on the new circuit built in the early '80s are in the same location.
At some point, not sure when, these two straights were deleted from the Nordschleife race circuit and the pits moved to the top of Hatzenbach at the T13 stands.
The current GP F1 circuit is partly built on the old Sudschleife. The rest of the Sudschleife is either used as local roads or has fallen into disrepair.
Here's an old vid of part of the Sudschleife...