Auto boot Tx2 on DC power connection

Dear people of knowledge,

As I understand, the Tx2 does not have a BIOS, so I cannot play with any boot settings in the traditional way.
Is there a way to automatically boot the Tx2 when the power adapter gets plugged in? Or otherwise try and boot always as long as there is power?
We need to place our Tx2 in an environment for a period of time where it will not be manually accessible, whilst the power might turn on and off. However, the jetson must be in operation continuously while it has power to do so.

Any suggestions?

thanks in advance!

This thread might help:

We use a microcontroller with a mosfet to power on our board.