2 identical volume sliders (options / pause)

Hello

I have a volume slider in the options menu and in the pause menu; I would like them both to cooperatively change the volume.

Both sliders have the "EventSounds" script; is this proper usage?

Currently I have both set up this way:

Action Type  - Persistent Settings Control
    Persistent Settings Command - Set Mixer Volume
    Volume Mode - Use Slider Value



I am using one instance of MasterAudio which persists; actually, there is only one scene in the game.
I am using the previous version; I have since got the newer but don't see any need to upgrade currently.

I am using MasterAudio for UI sounds and music playlist.

Thanks

Danny