Pry gently with a plastic tool.
Then you should be able to see the 4 screws that hold the switch mount assembly to the wall.
Do turn your use/store switch to “store” and unplug shore power before messing with the switch wiring in the interest of safety and not blowing fuses!
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.