Can someone tell me more exactly where this is? The manual says there is an access hole cover under the floor mat on the left side (Really? A 66-year-old floor mat still alive? Mine has carpet, firmly attached and tucked under the top and side panels) that accesses the filler cap nut. In order to reach it, I am going to have to cut out a small piece of carpet and replace it after filling with brake fluid, and would would sure like a ballpark location before I start slicing away. Thanks, LHop