---pasting this from the saab92x.com forum...
Thanks for all of the information provided - I was able to stick the SiriusConnect device and the Pioneer Sirius adapter into the large area under the climate control. I simply used double sided tape to attach them to the left and to the right inside plastic (didn't want to put them on top of the factory amp, I don't know how hot it gets).
I also placed the Sirius and navigation antennas under the clock pod. If you're already installing a radio, I recommend just unscrewing the three screws at the base of the vents, removing them, then pop