Led 3rd brake light

Ok u might remember one of my last posts about the leds right, well i siad im buying new. And which i did , I bought the Tac units 3 leds and the DOmination _here comes trouble dvd.Anwayz i wanna put the LED in my 3rd rake light BUT it mounts on the inside, do i have to take my headliner out to get to it? OR is there anyway i can bypass taking more shit apart to put2 bolts in? Does anyone have a ranger on here wif a LED 3rd brake light ? Kind of wanna see wat they look like

3rd brake light comesoff from the outside, as far as shaving it/putting in new one, u got take the headliner out.