The 2015 FLTRUSE lights will come on automatically under certain conditions, per the owner's manual.
"The Tour-Pak light is mounted in the lid. Additional lights, mounted under each side of the Tour-Pak, shine down into the saddlebags. The luggage lights automatically turn on when the motorcycle is turned off (OFF/RUN switch set to OFF). The lights remain on for approximately two minutes. Lights shut off immediately if power lock fob is used to engage the power locks.
The luggage lights also turn on and remain on while the motorcycle is in accessory mode (by holding down the trigger switch)."
This appears to be the way the factory installed lights work in all the Rushmore bikes (2014 up), but the kits offered in the Accessory Catalog for 2014 - 2020 models still use the manual switch type.
The 2007 - 2013 models just have the manual switch in each light, which is a PITA in many cases. The best TP lights were from before 2007 when the light had a gravity switch that automatically turned the light on when the lid was opened. Unfortunately those lights starting having severe problems and didn't shut off, killing people's batteries. The H-D "fix" was to eliminate that light and go to the manual switch-in-the-lens stuff. I guess they and their vendor forgot how to make a reliable gravity switch.
Jerry