SB RX/Inspire T7900 connections

[rdellpcsupport]

Since Win10 upgrade I have been unable to use my 7.1 Creative Inspire T7900 Sound system. I have purchased an Audigy RX to fix this but research has failed to find how to connect.

T7900 has lead with 4 jacks:
- Green, Orange, Black, Grey

Audigy RX has 7 inputs
1 - Mic
2 - Mic
3 - ??
4 - Green
5 - Black
6 - Orange
7 - ??

I've seen chart with:
Green = FL/FR
Orange = SubW / Center
Black = RL/RR
Grey = SideL/SideR

Can anyone help please?

 

[rdellpcsupport]

Well configuration is working fine as 5.1. No Side speakers, and the Grey lead is not in use. A lot better than what I've put up with recently.