Just spotted these on ebay.

I didn't think you could get rear speakers for a 300? Where do they fit?

Surely a rare find?

http://cgi.ebay.co.uk/VOLVO-340-360-REA ... dZViewItem

In the C pillar. If you look there are marking for them.

they go on the rear pillars (c pillars ) where the rectangular mark is above the back seat /shelf area