Cable Plugs Help

[Dannynub]

So I am a newby pc builder and i manged to build my current pc all okay without anyproblems. But since the first build i have neglected the +5v, D+, D-, Ground cable from my case and i guess that cable is for the front panel sound and usbs but im not sure where to plug them in. I have referred to the manual many times but i never got it.

Build
Thermaltake Commander Mid tower atx
ASUS P8Z77-V LK

 

[clutchc]

I've never seen a case with cables marked "+5v, D+, D-, Ground ", but if you want to connect your USB and FP Audio, it is shown in the motherboard manual.