If youre removing the old ones, use them to pull the new ones through. Or, pull several sections of string through at one time using the old, then use one string to pull new cables through as you need them. When I sold my Sabre, I still had 2 or 3 strings tied up under the dash. The guy asked what they were for and I said, thats in case you ever want to install another unit at the dash, you can pull more cable through. lol13 PIV w/ 200 MercIG: WarriorRiverCustomRods