You can boot up the Hit Box into different controller modes when you plug it into a PC. Here's an overview of the button layouts for each mode: Button Layouts on Hit Box.
Xinput mode is the Hit Box default mode on PC.
Hold down P1/LP while plugging in the Hit Box.
Read as P3 Wired Gamepad v1.6.
(If you're having trouble getting your Hit Box to read on a PS3, try this out.)
Hold P2/MP while plugging in the Hit Box.
Read as P4 Wired Gamepad v1.6.
(When plugging into a PS4, it should boot into PS4 mode on default.)
This is the default mode for Hit Box on PC.
To force this mode, hold P3/HP while plugging in the Hit Box.
Read as Controller/Xbox 360 for Windows.
Use this mode for Windows Gaming.
(This mode has been known to work on Xbox 360.)
Hold P4/PPP while plugging in the Hit Box.
Read as Real Arcade Pro S.
(When plugging into a Switch, it should boot into Switch mode on default.)