Here's my problem,I removed the speedometer cable under dash to install new dash pad,after re-installing cable and driving the car{67 nova} I noticed the speedometer didnt work. I removed cable and hung it under dash then drove the car to see if the cable was good,and it was spinning as I drove.Now,is there something that can break or go wrong when installing these cables on the back of the speedometer? Is there something about this connection I should have been aware of?