The Front Runner instructions advise examining the separate belt-tensioner instructions, which show how to prepare the belt-tensioner to mount a polished aluminum front cover. First, you'll need to remove the tensioner roller. Then a tapered block nut must be pressed into the backside of the belt-tensioner before it's mounted to the aluminum main bracket. We tapped the rectangular block nut into place with a hammer. It may be necessary to remove excess metal flashing around the square opening for the tapered block nut to fit properly.