I apologize I don't have any direct experience with the add-on alternator, so just take this with a grain of salt, but it appears looking at the wiring diagram that you want to splice the brown wire(s) into your ignition signal. If the terminations are a male and a female bullet plug both connected together, then I'm sure this is right, just hook up the male one *only* - it has an unused female mate somewhere along the chassis hanging out of a harness nearby, which is also a brown wire.

I am looking to add a belt-driven air compressor to my project and am interested to see pictures of how your alternator kit mounts, once it's in there ...

 

Thinking about getting the optional alternator for my 3010 also. How is it driven? do you have to add a pulley to the engine? if so, where?

 

You do have to remove the plastic cover on the passenger side of the motor and install a pulley. The alternator is driven by a belt run off the pulley you install on the motor. The instructions are pretty vague but you can figure them out. I did have to ask Kawasaki about the wiring, you will have two small brown wires with the alternator only connect one of them to one of the small brown wires you will find in a wiring harness on the mule. I attached a link to Kawasaki’s insulation instructions. Hope this helps.
http://www.kawasaki.com/Site/kawasaki/techpubs/English/instl_instr/ii_999951289.pdf