It's mounted to the fence with a screw. Open cover, remove screw, then bring it inside for the surgery and use a spudger from an electronics kit.
Also, just noticed when I got home, it's not silicone (from a hardware store) I use, it's a silicone rubber sealant that most LED Ribbon tape suppliers would have for sealing outdoor connections. This stuff peels off in much bigger chunks than silicone.
Little tubes of it costs a couple bucks.
https://www.superbrightleds.com/wfls-gl1oz-1-oz-waterproof-sealant-tube-wfls-gl1oz