I've replaced the small door mirrors on my 2021 F-150 XLT with Ford powered Trailer Tow Mirrors (ML3Z17696DA kit). I had the mirrors installed by a dealer. I've ordered the correct wiring harnesses (ML3Z14631GA [left door], ML3Z14630CA [right door]) for the doors from Ford and now need installation instructions for the harnesses. I watched video's on removing the door panel but have not found any that specifically address the harness installation. Does anyone know of a video or where I can find instructions for installing the new wire harnesses in the doors. I would like to do the installation myself as getting an appointment to have a dealer do it requires a long wait, November at the earliest. Thanks in advance for any assistance.