I am trying to install electrics for a new trailer hitch. Need to run power from fuse panel to rear area. I can get many panels off and can snake wire but having problems near the Rear seat area.
I can get Panel A almost off by pulling the small clips behind Panel B. But I need to get panel C off which is held in place by the bottom of the rear seat as seen in Panel C picture.
Pretty sure I can get access to the panels near the driver seat and through Firewall.
Thanks for help.

 

If you peel back the rubber seal, gently place a large screwdriver under panel C and gently prise it up.
You can feel where the crips are underneath by the tension and try to lever as close to the clips as possible.