How to install kernel headers on nvidia drive agx orin

Please provide the following info (tick the boxes after creating this topic):
Software Version
DRIVE OS 6.0.10.0
DRIVE OS 6.0.8.1
DRIVE OS 6.0.6
DRIVE OS 6.0.5
DRIVE OS 6.0.4 (rev. 1)
DRIVE OS 6.0.4 SDK
other

Target Operating System
Linux
QNX
other

Hardware Platform
DRIVE AGX Orin Developer Kit (940-63710-0010-300)
DRIVE AGX Orin Developer Kit (940-63710-0010-200)
DRIVE AGX Orin Developer Kit (940-63710-0010-100)
DRIVE AGX Orin Developer Kit (940-63710-0010-D00)
DRIVE AGX Orin Developer Kit (940-63710-0010-C00)
DRIVE AGX Orin Developer Kit (not sure its number)
other

SDK Manager Version
2.1.0
other

Host Machine Version
native Ubuntu Linux 20.04 Host installed with SDK Manager
native Ubuntu Linux 20.04 Host installed with DRIVE OS Docker Containers
native Ubuntu Linux 18.04 Host installed with DRIVE OS Docker Containers
other

Issue Description
How to install kernel headers on nvidia drive agx orin?
I am trying following:
sudo apt update
sudo apt install nvidia-l4t-kernel-headers
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package nvidia-l4t-kernel-headers

/etc/apt/sources.list.d/nvidia-l4t-apt-source.list is empty.

Which repo have i add for drive agx orin?

Error String
Reading package lists… Done
Building dependency tree
Reading state information… Done
E: Unable to locate package nvidia-l4t-kernel-headers

Dear @llachev ,
Does Missing linux header files help?