The stock motor turns the lower stone clockwise. As a result, the front of the pie is the part that is about to go near the hottest part of the oven ( near the flame at the right ) and as it exits the flame, the rim is facing the rear of the BS and you can't see it. If you reverse the motor, you can watch the pie as it is rotating towards the flame. That way, you are in a better position to pull the pie when it is as brown as you like it. If it is just right, you pull the pie, if it needs a little more, you let it continue to rotate. It is not a critical mod, but it is pretty easy to do, and undo, depending on what motor you use.
The stock motor comes with a battery compartment, and a power transformer and plug. If you are just using battery power ( and haven't plugged it in ) just reverse the batteries in the battery compartment and the platter will rotate counter clockwise. Make sure you don't plug it in while the batteries are in backwards.
If you are using the stock motor, and the plug in transformer, there is an easy change, just cut the wire coming out of the transformer, and you will see a black wire and a red wire. Reconnect so that the black wire is connected to the red wire, and vice versa. This is the Chicago Bob Easy Peazzy method
Tampa's photo of Chicago Bob method
Still staying with the stock motor, you can change the wiring inside the rotisserie motor, so the transformer wire and battery can still plug in as normal, but the rotation of the motor changes by the inside change. This requires a soldering iron.
Another option is to combine the Switch Mod at the same time as the changing direction mod, and wire in a switch that lets you change direction , though frankly, not sure why you would want to switch back and forth.
If you decide to upgrade the rotisserie motor, some of them rotate CCW out of the box, so you won't need an adapter.