2004 F-150 Lariat. I am installing a switchboard under my AC controls and I need a way to hook it up to accessory power and to ground it. I was wondering if anyone had any recommendations on a wire I could splice into to get the accessory power or ground wire? I have an after market head unit so not all of the radio wire harness are used. Additionally, I do not have backup sensors on the truck so the wire harness for those (Part #97A6 14489 KHA) is also unused. So those were my original thoughts to use because I could just redirect those wires to my switch and not splice into anything.