I went to look it up for you, but the Toyota parts sites I've looked at in the past don't seem to have the prius.
Anyway, the best way to find that information is to check a shop manual or a parts site. Or you could even call up toyota and ask them or go into a dealership. The guys at my honda dealership are very nice and will always help me out with that sort of request.
Furthermore, I think the tank set up is pretty simply, just a tank with three lines, one in, one out, and one on some sort of control solenoid, IIRC.
