You can drill a hole in the clamp into the crash bar when you have them in the position you want them and put a metal screw of the proper size through the clamp and into the crash bar. Hope this helps

hoser
+1

After I got the clamp in the right place, I drilled and line tapped the clamp and crash bar 1/4 - 20 and installed a SS button head screw into both. Problem solved!
