ok put down the soldering iron
DO you have a wiring diagram? heres one that should be generally the same as your bike..
DId you hook up the ground wire with the loop to the frame like this?..
Make sure its metal to metal, no paint.
until you fix your starter button, unplug the green/red at the solenoid so it doesnt keep going off.
Now, confirm that these are hooked up...
Red from battery to solenoid
red/white from solenoid (or from above red wire) to red/white on harness (i think this is your problem)
DO your lights come on? if no, then....
Confirm power at the main fuse with a tester(do you have one?). both sides of fuse.
if yes, now confirm power in the red terminal at the ignition switch. If yes, then...
turn key to ignition, and in the headlight, test black wire and brown/white wire. try it with the key in position 1 and 2.
This will greatly narrow down your problems. Let me know what you get.