MusE: How to replace a system path for customization

I’m using MusE, an audio production application. You can download the AppImage here. The performance is OK, by the way, I use Debian 11.

In MusE you can modify the sounds it uses for metronome. In its official documentation explains how to achieve this process.

The problem is the path that MusE reads to load custom sounds: share/muse-4.0/metronome

The developers wrote that info for compiled version or versions from OS repositories. Well, I tried two possible paths but I can’t load my sounds:


What is the correct path for AppImage reads my metronome customizations?