A coupling apparatus includes a base, an arm extending from the base, a first tow ball extending from a first side of the arm, and a second tow ball extending from an opposite second side of the arm. The base is configured to be removably attached to a vehicle in opposite first and second positions such that the first tow ball is in an upright orientation when the base is attached to a vehicle in the first position, and the second tow ball is in an upright orientation when the base is attached to a vehicle in the second position. Each of the first and second end portions of the base includes a respective post, and a retainer assembly is configured to be removably attachable to each post.