Help with overriding the music player.

[kuroneko TNG]

I know harmony can be used for injecting things, but how would I go about overriding the music player to add a custom player in? I've never used harmony before and I've read the wiki but I'm lost on execution. I have the Assembly-CSharp decompiled in dotPeek and I've noticed that I can get both MusicManagerEntry and MusicManagerPlay but which one do I need to override? Would I override both or only one? How would I override them? I've been non-stop searching on how to do things.