Brown37

I am in need of advice. I have purchased a used 2001 outback wagon. I did not realize you could only use a Subaru Cig. lighter in the outlet. After blowing a fuse, I read the manual and realized I needed to install an accessory power outlet. The instuctions seem simple, however, I can not figure out how to remove the gray clip in the engine compartment so that I may remove the grommet that is under the clip at the firewall so that I may cut a slit in the firewall. I would also like any advice that might make this installation easier. Thank you for your help.