Hi Crow,
Use the type that has built in regulator. It will have the two prongs that are side by side for the plug like - - and not one on top of the other like = that way you go from your ignition switch to one prong and ground the other. When you turn on the switch, the rotor becomes a magnet and when it spins, you get voltage from the stater and it will come out the large post with a nut. Run a wire from the large post to the positive on the battery and it should work. Contriving a mount shouldn't be a large problem.

Truck Tinker