I first thought of using safety wire but then thought that if the insert did move the wire could slice it.
So, I took the other path of using a zip tie but I didn't like that the zip tie might move on the insert and defeat it's purpose.
My solution was to use a zip tie that was as wide as the insert, it is also slightly under the OEM rubber so the zip can't move.
Additionally, if the zip does ever need to be replaced, it can be without removing the mount.
Yes, I cut off the tail.