Can anyone tell me what diameter the hole size is behind the v-6 badge? Also I want to wire them as turn signals only. In the How To section it shows wires going to both the turn signal and the parking light. I assume both those join together and connect to one lead and the other lead which isn't shown in the diagram goes to the gound correct? Now if I want them to only be turn signals all I need to do is connect one side of the bulb to the diode to the turn signal and the other side to ground right? Thanks for the help.