I fished the wire for the tail position light up through the grommets in the stabilizer. I sanded the bottom of the fairing so that it cleared the rudder. I matched drilled the fairing to the stabilizer. I positioned and drilled the position light holder and then drilled a hole through the fairing and installed a grommet for the wire to power the light. I then riveted the faring rib to the vertical stabilizer. I needed to move the top grommet in the vertical stabilizer as the rib covered it.