What size resistor is used on AC fence charger input near the plug connection?

The discussion concerns identifying the size and type of a resistor located near the AC input plug of an old electric fence charger. The charger is identified as a "Unico Model 2-4-D Rocket." The resistor in question is welded near the three-prong chopper plug, connecting a red wire to a yellow wire. The original resistor was damaged, possibly by a lightning strike. There is uncertainty whether the component is actually a resistor or a metal-oxide varistor (MOV) used for transient voltage protection. Due to the age of the charger and potential unavailability of manufacturer support, it is suggested to check newer models for design references. No definitive resistor specifications were provided.
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