Got a pre-built PC using the above case, and told the guys I was intending to install my own old HDD into it. I get that it goes into the bottom of the case, but I think that's where all the wires and cables are, as well as the power supply. Should I just be able to move the cables out of the way and fit it? Last thing I want to do is have to take the PSU out but it's not very obvious (to me at least!!!).