Head unit install 99 EB mach ?? 3rd plug ??

[Erik727]

Have a 99 Eddie Bauer with mach system,,bought a Kenwood KDC-HD752BT from Sonic Electronix...Came with harnesses and dash kit .
My question is---- I want to retain the factory sub ..The harness kit they sent me is the Scosche FDK-13B ,,it came with the plug for the sub with rca's....My factory radio has 3 plugs ,,a long rectangular plug, a big square plug and a small square ..I know the small square is for the sub , the rectanguar plugs into the harness sonic sent me...What happens to the large square plug ?? Just tape it off and not use ? I'm guessing its for steering wheel controls /and or cd changer ..My vehicle does not have a cd changer

 

[shadowless127]

The EB came with a CD changer stock, it should be in the center console; you can't have the mach sound system w/o the CD Changer. With that being said, just leave the plug alone.