After soldering over 30 SMD LEDs for the sky and the first platine, I made some tests to see if everything was connected right.
Yes! Everything is perfect! I can hear the music and I am able to connect to the BT device with my phone!
Now I need only to wait for the last ordered connectors, so I can connect the 5V directly to my suitcase.
For the sky
I am connecting the LEDs behind the plate and I fix them with hot glue. Total 30 LEDs, 6 of them are used in a different way, I want use some glass fibre to create more stars (something like a milk way, hope I dont need too much fibre). Hope a friend of my can create a support for the LED with a 3D printer.