Introduction
The screws could be torx or Philips head in the body and where the neck bolts to the body.
Tools
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            Remove all 16 #10-torx screws from the back side of the case. 
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            Gently separate the case pieces. 
 
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            Unscrew the 2 Philips head screws 
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            Peel off the pads. 
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            Push the colored keys out from the other side. 
 
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            Unscrew the red screws and pull the board out. 
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            Then, unscrew the blue screws 
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            Pull the bracket things off. 
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            Pull out the pin. 
 
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One comment
"unused port" is for a footpedal switch,not positive but believe all GH style guitars have one