@carsman248 by the image you posted your HDD is a WD200AA-60ANA0 Western Digital Caviar 20GB 5400RPM ATA-66 2MB Cache 3.5-inch Internal drive. It is an IDE drive. What voltages do you get on the connector? Post some pictures of the PCB and point out which IC gets hot. See if there are any marking on it. It is possible it heats up because your drive is to gummed up.
The connection should be one Common and three signal lines (it's a stepper motor so it works a little different since this is a 3phase motor). Voltage should be 5V16V depending on the PCB I start checking for 5V first and expect 12V. Do you have any identifier on the motor. Do not just connect a power supply to your motor...... if anything you need something like this https://www.digikey.in/en/articles/why-and-how-to-sinusoidally-control-three-phase-brushless-dc-motors and remember you can purchase controllers https://www.banggood.in/3pcs-5V-12V-DC-Brushless-Motor-Driver-Board-Controller-For-Hard-Drive-Motor-34-Wire-p-1171959.html?cur_warehouse=CN like this