Freezer Trap

In Attack of the Radioactive Thing there are multiple traps and among those traps is the freezer trap. This trap is located inside the market in the freezer and to use it you need to repair it. The part you are looking for is on the left side of the gas station on top of some boxes.

Once you get the part you can install it at the broken power box in the freezer by holding your interact button. Then once it is installed you can buy the trap for 750 points. You can use this to kill zombies or get one of the important parts of the easter egg.