I've pulled the whole center console out as I couldn't find the cable even after removing the bucket you mentiones. This cable does not exist and I have the JDM Muranao as well. In your video why don't you show it actually playing music. I think this is fake!
I'm happy to play music on it for you. You just need to contact the people who write the code for android devices and get them to change it so that recording video doesn't shut the music off. Let me know when you have achieved this and I'll post it up.
Iv just come across this video. Iv been trying to connect my phone, i have also followed everything you mentioned & couldnt see any wires/cords unless they were taken out by previous owners 🤦🏼♀️