help needed on my Ms PAC control panel

[daywane]

2 coin buttons. (1 will also act as select (hot button))
2 start buttons
1 pause button
1 menu button
1 Pi power button
2 action buttons need for my ROM list of games.
running attract mode on a Pi.
9 buttons total . am I forgetting something?

[daywane]

i have a small keyboard but I would prefer nobody use it but me.
some buttons could go on the top of cab also