I spent a good chunk of time looking for and finally finding the Accessory wiring in the front of my '19 RTL. I finally discovered it after taking the battery out and it was right behind the rubber plug in the left side of the frunk. After finding it, I ran the power cable that came with my Zumo XT from the accessory wiring terminals back and up to where the switches are for the fog lights and the grip heaters. I removed one of the blanks and brought the wiring up through there and up to my GPS center mounted base. All I can say is that working on the Spyder and doing stuff like this is a b!tch!.....but it's done and working.