I have a 2002 F-150 XL Regular Cab.

When i removed my factory head unit, i found two cords with only one being plugged into the factory unit. What is that other cord with the piece of tape over the connectors for?

Also, where does that hole in the back of the bay that the head unit sits in lead to? Or does it not lead to anything?

Thanks. All of you guys on here are a lot of help.

 

The other cord is for a CD changer. Not sure where the "black hole" goes.