Because what you propose is factory fit on the Australian version as above, the standard loom already includes connections for it. Look for two way connector tucked away with green/purple and black cables. You will just need the lamp pod U340032 and pedestal T400037 and drill a hole of course.
Thank you Gentlemen for your help. I wasn't trying to reinvent the wheel, that is why I wanted to post this. I have contacted my dealer and he is trying to get it ordered for me. I assume the wiring harness is close to the area where the third brake light will mount??
