I bought the side mount plate: http://www.directlineparts.com/product.asp?pid=6068&str=290&ID=111132359 and want to mount it to the hollow axle. I saw a while ago where some guys were talking about using some type of concrete bolts (?) to hold it in the hollow axle and some other hardware. Can't find the thread. Can someone help me out here. I have not found a way to hook it up to the unused shock mount bolt as it just doesn't seem to fit there. Any help is appreciated.