My new CD player question

[johndmc57@xxxx]

I installed a CD player in my "D" and I only have one question,"Why 
did I wait so long," the CD music adds so much ejoyment to driving 
this car. By the way, can someone tell me what that thing is in the 
middle of the console, it has a plugin jack and is connected to a 
black wire under the radio with and end plug that looks like a 
computer mouse connector.