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#51
You most likly could use everything if you have the need to when you install a MB it has it 's features listed and where to plug the wires to and from in a diagram
If you have no use for certain features you can just leave it but tie the cable up so you don't have a issue with a loose wire other then that most of the time I end up just plugging all the cables in
I doubt you want to pay for something and not get the full inteded use
Follow your Mb manual and you should be ok