Usually, there is a front panel audio connector that will mate with the connector on the motherboard. In older systems it is labeled "AC97". On newer systems there is also "HD Audio" connector. What you have on the motherboard looks like it would interface with either AC 97 or HD Audio front panel connectors (HD Audio is preferred if available). If you just have individual wires that is a very old system. You would have to refer to the case documentation for what goes where.