Not sure I fully understood your situation but if you mean the original attachment point is broken and if it used a screw you can try using a slightly larger diameter screw if the old one has stripped out. If you need a quick fix try an epoxy that you mix both parts and attach that way. I doubt the insert is terribly expensive at the dealer so may be worth at least asking for a quote, sometimes (rarely) you get surprised. Good luck or take a shot from below with a flashlight if I'm way off base and maybe we can better assist.