Where do i put in the remote app pass code i receive on my phone onto iTunes 11.

I have been relentlessly trying to set up my remote app but ive been hitting obstacles all the way here. I have everything set up on both my i phone and my PC (Home sharing switched ON on both devices) but on my iphone it says that i have to switch ON home sharing on my itunes even though it is already on.
So then i tried to set up my itunes by using this passcode method but then i came across this dilemna..
Quite simply I cant find the place to enter my passcode, from the phone, on itunes 11.

I've been told we have to enter this somewhere on itunes when we click the device "iphone" but this is option is nowhere in sight on iTunes 11!

Please Help