Changing replacing a default sound cue with a new one via mod

What I would like to do is some how link a modified sound cue to replace the original cue and take on its references automatically.

Basically, let say the cue for waterfalls ambient, I would like to make it less loud by default, so I made a cue with a lower volume, but I can’t for the life of me figure out how to replace the default cue with the new one. I would like to do it like this so that any mods that use the waterfall cue will automatically hook into the new lower volume cue.

I know I could just edit the default, but then my mod wouldn’t be stackable, so basically what I’m asking is if there is anyway to do what I want while making the mod stackable.