|The female connectors on the wiring from the front of generic cases often have characters (letters and/or + or -) on one side that indicate what they are for. Some generic cases have a label stuck to the inside of the case that tells you which wires go where.|
The female connectors on the wiring from the front of brand name system cases may have no such characters - they may be one piece and have the wiring to that configured to suit the headers on specific mboards. If you supply the brand of the case and model number or similar found on the case, I might be able to determine how the headers on the mboard for that model are wired up, and therefore which wire in the female connector((s) connects to what.
Other than that, we need a description of what you are seeing.