On my new car I fastened the fuse panel to a piece of plate steel with another 1/4" piece of plate aluminum with a 3" hole in it on the back of the steel both being as wide as my fuse panel and as long, then under my dash I went to Westlake Hardware and purchased a very strong 3" round magent and fastened it to the firewall, that way my fuse panel snaps onto the magnet and locates itself because the magnet sticks in the center to the steel and not to the aluminum (as well) I left the harness long by about 8" so I can grab the whole panel and yank it down to see what is going on as its up high behind the dash. This was a low cost variation of Ron Francis's system but works well for me and cost just a few bucks. Best of Luck