extra electrode not visible with Muse2 and Bluemuse?

ℹ Computer information

• Platform OS (e.g Windows, Mac, Linux etc): Windows
• Python Version: 3.7
• Brain Interface Used (e.g Muse, OpenBCI, Notion etc): Muse2 with Bluemuse

📝 Provide detailed reproduction steps (if any)

1. Created extra electrode with mini usb 5 pins (https://hackaday.io/project/162169-muse-eeg-headset-making-extra-electrode/details)
2. Connected the Muse2 with Bluemuse
3. Started muse-lsl

✔️ Expected result

See the AUX channel

❌ Actual result

Not see the aux channel.

The Bluemuse page https://github.com/kowalej/BlueMuse says

Muse 2 has AUX channel disabled - if I try to stream from this channel I get errors. It looks like no data comes from the channel when debugging Bluetooth inside a sniffing tool, so I'm making the assumption that Muse 2 doesn't actually support the AUX (secret electrode) input - it just has a (non functioning) GATT characteristic which is the same UUID as the Muse (2016).

Confirmed? Or is there a workaround? Is there an alternative to Bluemuse for windows? Anyone else encountered this issue?

No repository file or test is named. Start by reproducing the Muse2/Bluemuse steps on Windows and tracing how muse-lsl discovers channels, then compare the AUX behavior with the Bluemuse report. Done means confirming whether Muse2 AUX is supported and identifying a verified workaround or documenting the limitation.