Help with starter solenoid please,i have no idea how to hook it up

 

Assuming it is a Bruin, you may already have blown the CDI as the blue/white is the negative feed from CDI to solenoid and you seem to have it touching a pos battery post. If you are fitting the correct solenoid with fuse built in, those blue/white, blue/black and thin red wires should all go into a plug which plugs into the solenoid. The thick red should go to binding post marked B and thick black to binding post marked M. Afraid I don't know the pin out of that wiring plug, but once you fit the thick wires, two of the spades on the solenoid will be positive, the reds go to them, don't think it matters which way you connect the other two wires as long as it isn't to a pos spade on the solenoid.