Telephone on a Cadillac Seville

Hello, i have a 1999 Cadillac Seville and i was wondering if any one has a diagram for the bose radio and another diagram for the phone that is on the arm rest. what i am trying to do is use that phone and replace it with my cell phone.... i dont know if i am making any sense... and if im lucky in trying to purchase a boudle din for the radio to just go ahead and replace everything.. what do you guys think??

Thanks in advance