J-PAC users, I need help! Insert coin shortcut?

Apparently the J-Pac has built in shortcut keys for commonly used things. I've been trying to figure out the stick movement / button combos to add credits, exit games, etc. I've exited games on accident a few times, can't figure out how to add credits for the life of me. Stealing the keyboard from the PC to put into the arcade cab is getting old.. lol