Givi E52 topbox brake lights

[shoei]

How do I wire this into the canbus? There's two wires from the top box. Which wires do I join them to? I know it's easy normally but this canbus is making me real nervous!!!!

Cheers

 

[mingo]

What I did was to tap into the brake light wire and ground wire at the back of the tail light, brown is negative, then it's one of the 2 other wires, trial and error. No canbus issues at all.