HP CD-Writer Plus Internal 8110i Drive - Manual (Page 39)

1-30 Replacing an Existing CD-ROM Drive With a CD-Writer Plus
Next, connect the other end of the audio cable to the sound board inside
your computer.
Tips for connecting the audio cable to the sound board
■ Identify the sound board.
To identify the sound board look for microphone connectors on the back
of your computer. The circuit board inside the computer attached to the
microphone connectors is the sound board.
Sound board
The large connector or the small connector
sound board. Use only one connector.
“CD-IN” horizontal
connector
“CD-IN” vertical
connector
Audio
cable
may be the one that works for your