Rookie speedo question

I am putting back together my car and forgot what was involved with this speedo cable of mine. It's an A833 4 spd and the speedo wires into an aftermarket gauge. Question is,
Am I missing a shaft or something that fits in the centre holes? If so, where do I get one cause I have looked everywhere for something thats supposed to go here lol. (I thought I was so careful when I documented pulling this car apart...yeesh)