How to enter the rapberry PI OS SSH? Not Homeassistant SSH

Hi,
I have running homeassistant op a Pi4 with Homeassistant OS from out of the Rasberry pi installer.
Now i want to enable SSH, done this by putting a blank file with no extention in de root of te SD card.
I cant connect with putty.
I have the SSH adon running is homeassistand but that does not allow me to enter SUDO commands.
I want to add Tesla Mate to this Rasberry pi 4 separate to home assistant.
Some help would be nice!
THX!

You can’t do this when using the Home Assistant OS. You would have to use another Advanced Installation Method.

Or you could try using a TeslaMate integration.