for the radio controls on the steering wheel, you need another clock spring too, you need one with 2 wires leading down the column. it un plugs next to the air bag plug from the clock spring. then that plugs wire seems to just goes to the radio via the the back of the dash.
if you ever shopped for a clock spring, like i have, you will see little notes, w/o radio controls, or with radio controls. pic tells the story tho, 4 wires 2 on the top 2 leading down the column.
just found this link may help, i didn't read the whole thing, but its the right idea. How-to: install steering wheel w/radio controls it shows the 2 clock springs.