New to the community. I currently have a 2019 F350 XL 6.7 Powerstroke. I have owned a 1999 F150 XLT, 2001 F150 XLT, 2003 XLT f150, 2005 F150 Harley Davidson Edition, two 2006 f350 King Ranch 6.0 powerstrokes. I have a question and hope I can get the answer I need. MY 2019 F350 is a XL with just the AM/FM radio. The rear doors do not have any speakers. When I pull off the door panel I did not find any existing wiring for the speakers. From what I have found this normal. I have installed a new head unit and the truck wiring harness at the radio has wiring for rear speakers. And any one point me in the right direction to get my new speakers added to the rear doors. Thank you for your help.