There are three wires going to the turn signal/parking lights in the grill, the black one is the ground. One of the others is for the turn signal and the other is for the parking light. They're both the same color but its pretty easy to test to see which is which, then just splice into the ground and the parking light wire. If you splice in but keep the wire connected to the grill light, those ones will at the same time as your LEDs, if you cut it then you will only have LEDs for parking lights. Hope this helps.
SVT header, SVT cat-back, H&R Cup Kit
Rally Revolution #78, NW Posse #44