Installing Windows 7 onto SSD in a custom build PC

I’ve recently purchased a custom built PC from a company and I’ve included in it an SSD for the operating system and programs, and a 1TB HDD for storage both are brand new with no data installed. Once I receive the PC I will be installing my own copy of Windows 7 Ultimate 64 bit. I’ve read on a number of forums that I need to unplug the HDD before completing the clean install of Windows 7...