nielspbr

The rectifier is mounted on the frame under the tank. (front-left)
Did you put a fuse in the fuse holder? (glass fuse, 12V 10A slow)

For the E-start version you need a different ( >= 2005) throttle-switch cluster. that one has a starter button on the spot where the kill switch is now.

Or you just put a starter switch somewhere on your handlebars or frame, run a wire from (ignitionswitch)orange to switch and another wire from switch to starter relay.
For an e-start engine you also need a starter relay with the thicker wires. green going directly from battery(-) to startermotor and red going from battery(+) to startrelay and from startrelay to startermotor.