The Nine's base JBeam (BeamNG.drive\content\vehicles\nine.zip\nine.jbeam) should have what you're looking for.
Well, the lights function properly but the brake light textures are glitched. Seeing if I can find a fix now. --- Post updated --- Turns out you have to edit the .dae and split the brakelights into right and left to fix it but it works. The only problem is this edit causes modded lights to break so the method is not a science.