They dont have a manual switch like the other lights. You can access them either by the LCI panel by the sink, or the app on your phone. I think they are listed as 'entertainment' lights, but I have not used them in a while.
What year is you 4113? In our 2017 the switch is in the rear door side basement, on the rear bulkhead. After turning it on you still have to use the magic lights phone app to control the lights.