you could use your front panel audio connections for headphone 7 just switch it audio output in sound drivers thats what i do.
both speakers & headphones are always plugged in just switch sound device output
Thats what I do, although make sure your speakers are turned off when you have your headphones plugged in, I was once listening to loud music on headphones one night, only to then realise its also waking everyone up from my speakers, nice, lol.
Just get yourself a Plantronics Audio headphone switch.
Cost about £10 delivered.
Just google it.