Lexus RC F 2015+ :: PCS / ABS / Brake And BSM Lights On - Locked Out Of First Gear In Manual Mode

I was driving along today and my dash lit up light a Christmas tree. I got PCS, ABS, Brake and BSM lights and I was locked out of first gear in manual mode. Other than the lights and having to driving in auto mode, the car drove fine. When I got home I inspected the rear suspension and saw that the driver's side speed sensor's rubber shielding where it attaches to control arm was damaged. It was not completely severed, but there was a hole and some exposed copper wiring. I had SPC rear control arms and RSR coilovers installed and the car was lowered about 1.3 inches in rear. I was able to use extra copper wire and electrical tape to temporarily fix the problem. After all the wires where connected and shielded with electrical tape, I got zero lights when I started the car.

I'm not sure how it happened. Maybe the wire was damaged during install or it was pinched due to car being lowered. Whatever the case, make sure the wire is secured in a way to avoid being pinched during suspension travel. I ordered the new wire and will attempt to replace. Looks pretty straight forward except the wire goes into the interior of the car somewhere. I read that I will have to remove rear seats. If so, that should be pretty easy. Is there something I'm missing? Will any of the rear interior need to be removed? How to do this?