Texas Instruments TI-99/4A Barrel Jack Adaptor
thingiverse
If you intend to swap out the internal power board with the one designed by Re:Enthused, then this will help with mounting the DC barrel jack on the rear. You'll notice a small dimple on each part. Line them up, and they point to the bottom (so assuming you're working on the machine upside down as you do, then up) Johns power board: https://easyeda.com/jonn.blanchard/ti99-4a-replacement-power-board_copy_copy_copy_copy
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