No need for switches. Get a light that has on, off and motion sensor. My pass thru came with one on the least used end so I added another on the other end. Leave it in motion sensor mode and every time you open the hatch it will go on.
https://www.amazon.com/Dream-Lighting-Pancake-Automotive-Fixture/dp/B01KO0HAH6/ref=sr_1_2?crid=VMQCX2YXGS1M&keywords=Motion%2Bsensor%2Brv%2Binterior%2Blight&qid=1688046830&sprefix=motion%2Bsensor%2Brv%2Binterior%2Blight%2Caps%2C120&sr=8-2&th=1
2020 Keystone Cougar 22RBS, Ram 1500, two Jacks and plenty of time to roam!
The difference between genius and stupidity is that genius has its limits. A.E.
Good Sam Life Member