These solar lights simply unscrew from their plastic bulb. The entire solar unit is self-contained and can be used without further disassembly.
Be sure to remove the plastic covering from the solar cell, add your silicone adhesive if necessary, and fit the unit into the lid.
Note:it's a good idea to test the fit before using adhesive. After putting the first unit in, I realized this particular unit fits so snugly into the SLOM jar, no adhesive is necessary. This was a nice coincidence that allowed future sun jars to have a clean look without any adhesive showing through the top of the glass.