Hi
This may be of some help , there is a site by a company called JT MOTORSPORTS AND RACING there site lists parts and the part nubers by model for bikes,
under the one for the 500t the battery section shows the flasher relay in this area it looks like it has two wires. if you find this site it may help you.
A friend at work has just brought a 500t , but i dont think has joined our club yet but may be able to help if i find out more i will let you know.
Regards Dave
ps PLEASE POST SOME MORE PICS OF THE BROWN COW