Connect the black wire to the negative (-) terminal.
Here are some tips and tricks to help you get the most out of Autopica Android Player: Autopica Android Player Manual
A few sections feel machine-translated (e.g., “Click the button for play to make start”). Not a dealbreaker, but noticeable. Connect the black wire to the negative (-) terminal
It explains which audio/video formats (MKV, MP4, FLAC, etc.) are supported and how to enable hardware acceleration. This saves users from trial-and-error playback issues. Autopica Android Player Manual