This is a simple battery holder for the common CR2032 Battery. sometimes called a button battery.
To use strip the insulation 1/4 inch / 6mm on two wires. Stick both sripped ends in the holes in the middle of the case then slide the battery in. If the battery will not stay put use bigger wires or double the stripped end up and retwist. There is a hole in the bottom that you can use to push the battery out with a small screwdriver.
CR2032_Button_battery_holder_V3.stl | 1.6MB |