aver if my English translator of google, I can tell you how to do it, I have it done.
in the suitcase back there is a 12v socket with connector at the base of the trunk, I use this connector, use the earth as a mass for the brake light and position light
I added two connectors female and two males taken from a computer power supply, put them together with the originals and connect to the blue wire and cable brake light position (+) and connect to each new connector the luggage rack of the motorcycle.
triumph in the suitcase back quiats screws bottom and really bring cables from there you get the ground (-)
getting a wire from the handle of the suitcase lock me wiring you to the bottom of the suitcase.
inside the lock handle housing put red LED strips to turn on the brake and as the case has a few millimeters of clearance between the top and bottom, on the edge I put another strip of red LEDs that illuminate when you turn the bike along with tail position light.
my wife came up behind me in his car and says it looks much more at night