NCR 7458 - Manual (Page 27)

Chapter 3: Hardware Service 3-3
Back Panel Cable Connectors
The following illustrations identify the Back Panel connectors. The
optional USB Daughter Card has three 12V USB+ connectors, one 24V
USB+ connector, and Audio connectors.
20376
Audio
Out Mic
* RS232/A RS232/B
* RS232/C * RS232/D
VGA DVI-I Parallel LAN PS/2
12V USB 24V USB AC Input Accessory AC Mic Audio Out
(* Powered Serial Port)