I got it done. I got a combination of washers to equal the 4.5 mm that I needed and used bolts from the back side. This was a 3 hand job to make it easier so I had my son help me. The only way I could get this to work was put both bolt with the washers in the mounting bracket. I then got the upper bolt that is closest to the fender threaded on a few turns then the lower one closest the engine. I tried doing it opposite but even with extra hands I couldn't get the bolt started. The outer bolt was easy with a closed end 17mm. The inside one I needed to use a socket with a hinge adapter and a 3" extension. I will check them in a week to make sure they aren't coming loose.