yes, those slots are for a spanner wrench (basically a wide screwdriver with a space in the middle.
You can put a wide blade in those slots and unscrew it.
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Fazool "The wand chooses the wizard, Mr. Potter"
Taylor GC7, GA3-12, SB2-C, SB2-Cp...... Ibanez AVC-11MHx , AC-240
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