You watched the cursor blink. This was the moment of truth. If the drive was dead, or if you had bent a pin in that clumsy first attempt, the screen would flash red with an error.
Mount the drive
Look for 3.5-inch bays (standard for HDDs) or 2.5-inch slots (for SSDs). These are often near the front or bottom of the case . Mount the Drive: installing a sata hard drive top