Hi, i was installin the first tokico hp shock on the rear of my integra. i Dismantled the old shock and spring and replaced it with the tokico shock and when I try to reinstall the rear shock, the bottom fits on the control arm and there is a long bolt which goes into it. but the bolt is only half threaded. When i try to bolt it back on, it stops where the thread stops. How do the get the other half of the bolt in?