I replace the stock magneto to CDI wires with this very flexible shielded 16 gauge black speaker wire.
And use these little boxes to cover the connection on every 2-stroke I build, I just don't always put a keylock in it like this one.
I originally put the keylock in series with the blue wire but there is no need to run the ignition current through the switch.
Now I just treat the keylock the same as a kill button, it just shorts out black and blue with a key operated switch.
If this had a keylock it would be in the corner of the box on this flush side just to the left of the spark plug wire in the pic.
The other side as mentioned is a bit wider for the cable to the magneto and cable to the kill button which you actually don't need to hook up if don't want to, the keylock will kill your engine.
You then route the wire however you want to the magneto and solder them to the magneto coil.
Note I cut the white aux wire off every coil and in fact the newest Skyhawk magnetos don't even have a white wire.
This is same setup with a keylock on the CDI.
It won't keep a thief from stealing your bike, but it will keep him from starting it without a new CDI if you epoxy that cover onto the CDI ;-}
Top it off with a BPR7HIX Iridium spark plug and you will feel the difference in your engine performance. It's not a huge boost like an expansion chamber exhaust, but enough to feel and why I make it standard equipment on every build.