In removing the left fender to replace the inner splash panel, the bottom rearmost bolt broke off. I pulled the inside vent panel off but don't see any signs of the welded nut. I'm concerned with how to get this bolt out. If I drill it out or use an e-z out, etc and the nut breaks off, do I need to cut into the floor or side firewall area? Thanks again for all the help. It makes my therapy sessions more rewarding!