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Wild Thumper Motor Wires

Hi All


I have just purchased a Wild Thumper 4wd and have noticed that on two of the motors there are 4 wires which look like servo wires but I am unsure what they are for? I can get the bot running without attaching them but I guess they should go somewhere, they are red, black, yellow andwhite in colour.

I have looked on the internet and cannot see any other Wild Thumpers with them,