Lakota front break's light/switch
 

Can someone help me to understand how the front break's switch is actuated by the lever. My Lakota was sold with a system which actuate both front and rear breaks on the right front lever (due to Switzerland validation) and the switch has been moved to another place. Now I disconnected this system, but I don't know how/where to place the switch. It seems it should come under the master cylinder, but I don't understand how the lever should actuate it...
Thanks in advance.