For whatever reason my autoconfig is missing labels. Below I show the fixed version. If you ever want to remap controls in RGUI without this fix you will lose your mind.
\\centipede\configs\all\retroarch\autoconfig
DragonRise Inc. Generic USB Joystick .cfg
I added labels for buttons below so we can see them in RGUI.
the btn_label stuff appears on the left.
A, B, X, Y, Select, Start, L1, R1, L2, R2.
Button 1-8, Insert Coin and Start are the Mame Buttons.
Since Button1 is usually fire or jump this means primary action will Bottom Button
X
Y A
B