I tryed to crimp it both times to the point where its hard to press on. Seems to pop off when I rout it under the board. This time I crimped it on again, then covered with black rtv to hold it in place. Wasnt sure if I should use that or CA glue. If that dont hold Ill probably try tacking it on with soder. Just my luck.
At least that Mayhem didnt run off and hit someone. Failsafe works well.