ULX - Play sound doesnt work

Okay, so there is an option to play sound (Look at image below), but what is the directory to play sound? I tried many but they dont work
This comes up in console if it wont work…

It says pretty clear what the issue is. The path to the sound is incorrect.

No shit…
What I need is to know the CORRECT path to play sound.

<name of folder>/<name of sound file>.<type of sound file>

EXAMPLE: siege/leeroy.wav