Flashing Xavier NX with Jetpack4.6 and L4T 32.6.1

[bcs23301]

Hi,
I am using trying to flash a Xavier NX with Jetpack4.6 using the SDK manager (The xavier nx is built on a Auvidea JNX30D carrier board). I am running the SDK manager on an Ubuntu 18.04 host machine; however, I don’t seem to have the option of flashing it with any versions of Jetpack prior to 4.6.2. It is important that it is flashed with 4.6 as it will be be used to run software which requires L4T 32.6.1.

How can I flash the xavier nx with the required software? Is it possible to do it using the SDK manager or do I have to use a different method?
*The board has already been unsuccessfully flashed multiple times.

Thanks,
Ben

[WayneWWW]

How to install old JetPack version?

I need to install JetPack 4.2.2 (rev1) on a Xavier, but now when I check SDK Manager it is not listed under the Target Operating System menu. The options are: 4.5, 4.4.1, 4.4, 4.3, 4.2.3, and 3.3.3. Is there some other way to find and install it? I’ve looked in this archive: JetPack Archive | NVIDIA Developer, but for Xavier it just says to download SDK Manager, which once again doesn’t have the version I need.