You have to make up a simple little cable involving an 8-pin DIN plug, an RCA cable, and a piece of wire. If you do a quick search on the forums, you should be able some of my posts about it. Basically you can use the pin-out diagram for the DIN plug from Richard Bevan's Saab Audio Guide, and solder RCA cables to the front left, right, and ground pins on the DIN plug, and then solder the piece of wire to the turn-on lead. After that you can just plug the RCA cables into the line-out harness on your head unit and connect the turn-on wire to the antenna lead.