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,

Thanks for the reply’s
Thanks for the reply’s I will let you know how I get on