Precision 7560 GPU module

Hello, I just ordered a Precison 7560 from the Outlet without discreet graphics, and I'm wondering if I can buy a used graphics card module and install it myself. I've googled and found no information about this, not even what type of module it uses. But I see that there are used ones for sale on eBay and they say they're from the 7560. Is it just a matter of popping off the keyboard, removing some panels, applying some thermal paste, and slotting in the GPU?