If the correct ports are enabled in the bios, it will appear on the bios startup screen when you powerup your pc . You may not be able to see them unless you disable a setting like full screen logo.
If you miss it go into the bios by pressing the delete key or one of the Fkeys depending on your motherboard ,you should see your primary storage somewhere in the 1st menu or 2nd menu. Read up your BIOS documentation for more information