the spring plate on mine had a smooth stud the shock goes on that is threaded inside. a bolt with a large washer threaded in and hold the shock on. my 40s have the plate with the threaded stud on it. i don’t know which one the 60 use but the ones on my 62 definitely use a bolt that threads into the stud
Right, yes now I remember. Replaced mine a couple years ago when replacing springs, due to excessive rust.