OK, So I understand Exactly what you two are saying the cart moves with the bumps so the Cables need to move with the cart that is moving with the bumps but that will cause the cables to flex and the cable is not a flexible cable. My plan is, I will leave a little bit of slack for the 2 motor Cables and I will put a cable tie Down on the battery to hold the cable's there and we will be all set.
Thanks,
Matt