I have figured out the wiring to hook up a Motorola T605 to my Ford Stock Radio, except for one connection. The T605 has a wire that connects to the radio to signal that the cell phone is in use. This wire should go to the cell phone wire on the back of the ICP, but I am not sure if they are compatible. Can anyone provide any additional information about what that wire is expecting? I would hate to destroy the radio trying to figure it out.