Hardware Game boy Micro charger/adapter polarity

[TALANTO]

I bought a Gameboy Micro but the adapter's cord was cut in the middle. I soldered the the cable and it should works but when I tested it with multimeter it seem that I soldered the cables upside down:

But there is only one red wire into the cord the other wire is like shielding. There is no way to make a mistake.

I checked my other adapters and everything is as expect.

I don't want to risk my Gameboy. Can anyone check it's adapter and tell me what is the polarity?

 

[TALANTO]

According to this picture (if this is the connector of Gameboy Micro itself, not the adapter) everything is OK. But who knows. I flipped it to be aligned as mine pictures:

Check the Source.

 

[TALANTO]

Yes, nobody has charger like this...