I wired mine (2004 SS) to the driving lights. Here's how it looks
I will take more pictures at night. Im not sure if the wiring is the same on the aftermarket halo lights for the 2007's but I wired mine into the blue (+) wire and the black (-) wire going to the turn signal. This makes the halos & LEDs stay on with the driving lights but not blink with the blinkers.
the wiring on the 07 lights will be a little different, i think. im pretty sure those come with CCFL halos and the ones for 00-05 come with LED halos. i have mine baked apart right now trying to make the halos brighter.
i already bought some 55000mcd leds to put in, but they really dont do all that much, so im considering buying a CCFL setup from somewhere like DDMtuning and wiring it in. i really want the halos to be visible during the daylight.