Its all in my threads how I did it, but you can do it however lol.
http://www.buggiesgonewild.com/clone...-clone-bb.html
I made a linkage to hook the stock cable to and used the clone rod to carb. I removed the governor entirely but did use part of that arm as you can see in the photos of it.
Others have done it differently and just hooked the cable up or made a different lever, just search some for the threads you will find. I was in a welding shop so easy for me to make that stuff up as I did on the first clone I put in. That thread is referenced in there somewhere its in the yamaha gas section.
There is not much to the wiring I left all the cart wiring just unplug the coil/ignitor/pickup. I tapped the white/red wire to the coil to power a relay that is normally closed and opens when powered. Hook that to the kill switch on the clone, or in place of it, all it does is ground the ignition wire to the block unless you power up the cart/pedal. The white/red wire is the power from key to pedal to ignition when stock. So that kills it unless the pedal is 'on' if you use stock starting. Or you could bypass the pedal switch (or hook in after the key by the engine) it would kill via the key only and you would need to start it with something else.