I just got my 2009 model last night and installed everything I need.. GTX285, GT120, Decklink and an eSATA RAID controller, so I think I’ll have this fresh in memory. 😉
The connectors should be placed on the left side of the motherboard, facing you. There’s two of them, down to the left.
As Peter Chamerlain mentioned in another thread… You won’t necessary see any gain in performance with the Quadro vs the GTX. You will however be able to push it further with more nodes due to more RAM. The Quadro actually has less CUDA cores than the GTX285.