This is the best look you're going to get at a commercial CDI. It is one of the older CH units. All of the EXcel units are encapsulated in epoxy and you can't see anything.
Note that the step-up transformer is wound on a bobbin as opposed to a toroid. Also the 0.47 uF discharge capacitor should be rated at a minimum 400 volts and preferably 600 volts. Good luck!

Al