Go to the CB Performance website and then go to the Black Box item. There's an installation manual link that will tell you about wiring.
If you do this, you will lock out all mechanical advance in the distributor - that's the box's job. The box uses the pick-up in your distributor (points or module), then sends a signal to the box, which uses RPM (and vacuum, if connected) to advance the spark as needed. It sends a signal to the coil, which fires at the appropriate time, and sends the spark to the rotor, which gets distributed (hence the name "distributor") to the appropriate spark plug.
The upside is that it's fully adjustable and can use any locked out distributor. The downside is that it still uses the tiny distributor pickup and the 1920s tech distributor cap and rotor.
It's a nice bit of kit for those who don't want to go all the way to crank-fire and wasted spark.