To install the popcorn machine timer, you can refer to the following installation steps:

1. Make sure the popcorn machine is turned off and disconnect the power supply.

2. Find the timer installation location on the popcorn machine. Typically, it will be located on the control panel or on the side of the fuselage.

3. Insert the timer plug into the corresponding slot or connector. Make sure the plug matches the slot correctly and do not force it in.

4. Make sure the timer is installed firmly and will not loosen or shake.

5. According to the instructions or user manual of the popcorn machine, adjust the timer settings, such as time interval or countdown.

6. After completing the installation, reconnect the power supply and test whether the timer is working properly.