ok so i have a 57 f100 some time in the trucks life some one took out the speedo cable i just bought a new cable for my truck i found were the speedo cable goes screwed on but it looks a little weird to me is there suppose to be something inside of were the speedo goes on the tranny part i can see something there like were the metal part goes into from the cable i drove the truck with out the speedo cable connected to the speedo gauge and it dosent spin am i doing something wrong or is there something missing

FORD IS LIFE OIL N GAS IS MY BLOOD