Figured I'd add a few more pictures, of my install, which isn't quite as refined as Yzers. :D
My bike cable is attached just using a ring terminal, the butt connector is added just to ensure the cable doesn't come loose.
I meant to change this, but its been this way for quite a while and it seems to work, so I haven't touched it. Since I have cruise, I just drilled a hole for the cable to pass through, and the outer shielding of the bicycle cable just rest against the bracket.
I found a bicycle brake handle that actually had an emergency brake built in. The button on the side controls it. You pull the lever and push the button in, and it locks the throttle at 2500, until you touch the handle again.