To me it looks like gutter clamps. Some time ago I had old school (rain gutter mounted) ski racks and the clamps looked similar to the ones in that photo
as far as I could perceive from the busy photo. Don't know what more I can tell you. Two holes? What two holes?
If they won't send you better photos, and if you're not sure it's not going to work, let it pass.
How about starting a thread on Turbobricks maintenance & nonperformance forum
http://forums.turbobricks.com/forumdisplay.php?f=12
Much larger audience with higher probability they have or have seen Volvo racks.
Oh look, here are photos of gutter mount racks on a 745
http://forums.turbobricks.com/showth...highlight=rack
D24T.com is a wonderful forum, but I admit we are evidently not experts on gutter mount racks.