As @Scoop8 said - external enclosure is indeed a good way to use an internal hard drive as an external one. You can get either a USB connection or SATA connection, or even both on the same device.
This is also important if you plan to use the device in the future - If you want to be able to plug in different laptop drives at will, then you might want to consider a "drive dock" or "docking station" - this device wil enable you to plug naked drives into it, usually both 2.5" or 3.5" drives. This solution is more suitable if you regularly need to access several bare hard drives externally.
Weigh both of your options so you can make the most of the product you choose in the future.
Hope that was helpful, best regards, Citizen_WD