You use the frames from the C5 Seats and keep the electrical components with them. You take the C6 seats and bolt to the C5 brackets and your done. Tuck the electrical under the seat like it was.
It was very simple in my Z. Some guys use the c5 cover plate and some use the c6 cover plate to cover the controls i left mine exposed.
Heres some quick Iphone pics ill try to get better ones up!
Mario