Returns the index of the bone. If the bone was not found, -1 will be returned.
chassis_dummy, //Center of the dummy
chassis_Control, //Not found yet
door_dside_f, //Door left, front
door_dside_r, //Door left, back
door_pside_f, //Door right, front
door_pside_r, //Door right, back
platelight, //Position where the light above the numberplate is located
window_lf, //Window left, front
window_lr, //Window left, back
window_rf, //Window right, front
window_rr, //Window right, back
engine, //Position of the engine
ROPE_ATTATCH, //Not misspelled. In script "finale_heist2b.c4".
wheel_lf, //Wheel left, front
wheel_lr, //Wheel left, back
wheel_rf, //Wheel right, front
wheel_rr, //Wheel right, back
exhaust, //Exhaust. shows only the position of the stock-exhaust
overheat, //A position on the engine(not exactly sure, how to name it)
misc_e, //Not a car-bone.
seat_pside_f, //Seat next to driver
I doubt that the function is case-sensitive, since I found a "Chassis" and a "chassis". - Just tested: Definitely not case-sensitive.