Adding automatic reverse for A-Chassis model 6.52S2

I’m using the A-Chassis car model for my horror game that I’m developing, but I ran into a small issue.

The issue is that the player cannot reverse without shifting gears. I edited the model as I pleased and completely got rid of useless controls, such as ABS or TCS, and I also got rid of the GUI. The gear is automatic, so when the player gets in the vehicle you can immediately drive.

While getting rid of all the controls, I also got rid of the gear switching controls because it would be too complicated to make for mobile and console.

In conclusion, I’m asking for two things:

  • Where can I find the reverse code in the A-Chassis model itself? (6.52S2). I’ve searched the whole thing

  • How exactly could I make my own reverse, whether it’s by holding your Down key, or a custom keybind/toggle such as R?