It probably really doesn't matter what you use the side bulbs for as long as their color is appropriate. For Mach headlights, the bottom bulb is the turn signal while the top is the parking lights, but since your fixtures are the same size, it wont matter which you run for what as long as you use an orange bulb for the signal.
BTW. Those headlights look great. It really livens up your front end nicely.
Hatch Nation #13 : Rally Revolution #13 : ROTM Jan '13
It's Bryan, not Brian
RSVT-170 Build in Progress
Derusting Rusty Build in Progress