Jetway Computer NC93 - Manual (Page 15)

(2) CD Audio-In Headers (4-pin): CDIN
CDIN are the connectors for CD-Audio Input signal. Please connect it to CD-ROM
CD-Audio output connector.
CD Audio-In Headers
CDIN
4 1
GND CD-R CD-L GND
10
(3) USB Port Headers (9-pin): USB2/USB3
USB Port Header
VCC
Pin 1
-D
ATA
GN
D
+D
AT
A
VCC
NC
-
DA
TA
GN
D
+D
AT
A
(4) Speaker connector: SPEAK
This 4-pin connector connects to the case-mounted speaker. See the figure below.