yellow wire through fire wall

[catjim813]

Can any one tell me where does the yellow wire connect to that comes through the fire wall that is connected to a fuse on the passenger side of the car inner fender on a 69 280sl?  It came apart inside the car but I dont know where it connects to under the dash.   Had carpet installed and then noticed wire not connected.  Does it have any thing to do with the injection system?

[66andBlue]

Most likely it is a wire that powers the radio or an automatic antenna. Are both working?  Provided you have them, of course.
Another possibility could be a wire for the a/c although that fuse box was not intended for that purpose.