Inside your motherboard manual, you may want to look up "Front Panel Headers"
as they're all different for each motherboard.
As for cable management, here's a picture of my rig to give you an idea. Granted each case will be different in terms of cable management, but this will give you an idea of how to do it.
Front - you want the front of your case to look very clean to allow enough airflow.
Just make sure the cables are nice and tidy in the back so you can close the side panel
Feel free for any more questions!
I don't mind at all