Oculus remote button press without OVRInput class

Hi,
I’m trying to create a scene that can be generic to any VR platform and intercept generic button presses. The first on I’m testing with is Oculus. I’m trying intercept the remote Button.one press (remote select button) without OVRInput. Is this possible? It seems that when it;s pressed a UI button event is randomly being selected and invoked??? Which means Unity can see that it’s being pressed without Oculus Utilities in Unity 5.4.2. Can that press be intercepted by script?

Thx

Looks like the Input.GetKeyDown(KeyCode.Joystick1Button0) does the trick,

Thanks, that worked fine - but I wonder whats the proper way to this? The unity manual is not very clear on the input devices…
It says UnityEngine.Input.GetJoystickNames() to get the names, but what then? Do I have to map them in the Input Panel?