Ultimately there'll be a little knob to the rear of the vehicle that will allow the operator to steer it left and right.
I don't know about you, but it's fair to say that every shaft terminates with a knob on the end, and in my case, some shaft+knobs are bigger than others. It's nice to see the stacks on that V8! I was confused at first, because I last remembered a "V6" label on the box, but I guess that's for the lorry, then? Keep it coming with the awesome build!