I have just put all the parts together and I am ready to install Windows. However, I don't know how to open the hardware for me to put the disk in with the windows 8.1 media. The hardware I have installed is a Seagate 1TB Desktop HDD SATA 6Gb/s 64MB Cache 3.5-Inch Internal Bare Drive. I copied my build from the YouTube video of Budtron. So what button do I need to press in order for the hardware to open? I also lost the manual, if it came with any