so i am getting ready to have the stereo installed tomorrow (by a "professional") and in the manual, page 19, it says

If this connector [serial] is not used, care must be taken to ensure that it is insulated due to the 12V output present on pin 4.

so this worries me. What is the serial connection used for? i have no idea, so i have no idea if it will be used or not. Assuming not, how do you insulate a serial cable? what happens if i dont? will the unit short out and start a fire? will i get a loud buzzing sound every time i make a left turn? Will the stereo guy know what this means, and know how to insulate it? i doubt it, as i assume serial connections are unusual on car stereos.

help pls?

thanks
joe

30102792, 10 GB, Blue