Hello, and welcome to the forum.
I used to have a younger relative of this machine, the CVC-224. It was a Coca-Cola branded 5-selection.
In order to vend at all, I'm pretty sure you will need the relay box for the selector buttons. I don't see it on your machine, do you have it somewhere?
As for setting up gears, here is an old post on the subject. Be warned however it is for a different Choice Vend machine (a CVC-224, not mine but another one), you may not have the exact same gears in your vending setup.
http://soda-machines.com/discussions/index.php/topic,10871.0.html