Bartop aracade cabinet "recalbox main menu" button

[Alexander Tolstykh]

I want a button what work like a home+start button on a gamepad, but a single one. I build a cabinet and left a button for this function. Is there a chance i can make it work through Rpi3 connectors?
Single button on a gamepad will be okay ass well.

[Dragu]

@Alexander-Tolstykh
You can always combine buttons if you put a relay with double switch behind your unique button. I use it to connect my coin entry on both select from both player.