Cutting out the space for the larger LCD.
Two wires need to be soldered on to the tactile switch so you can bypass with a new one.
Cut out for the SD card slot.
Dummy buttons glued in place, speaker and extended speaker wires.
LCD held in place with hot glue.
Sat nav motherboard seated into Gameboy with extension wires for on/off switch.
Gameboy switch is now a push in action for on/off.
Dummy contrast wheel next to new SD slot.
Gameboy sat nav finished mounted in the car.