Question Ashida BT Audio Mosfet??? HELP!

[Goodie175]

I am working on my 2nd Ashida at the moment and want this one to have BT Audio for my headphones. I am currently working on a way to do this without some dummy plug as I've seen countless people do before on Gameboys and PSPs. I have a KCX Emmiter 1.7 but am willing to change to a different transmitter if someone has a better suggestion. Anyway I figured I could use a Mosfet to fake headphones being plugged in by closing connection to GND inside of the headphone jack and then steal the audio from there. I want this as it should shut off the audio to the Ashidas speakers and give me a solution without any added power switches that I would have to modify the case for. My only issue is I don't know a single thing about mosfets... guess I skipped that day in ELC101 lol. But anyway i Have made a diagram and I'm hoping someone can give me a bit of a explanation of how I would go about this or if there is a better way to achieve my ideas in a simpler fashion. If I am going about this totally wrong I'm sorry but like I said I've never really messed around with Transistors or Mosfets before and the internets explanation on the subject just hurts my head even worse (I'm probably just being stubborn)