Motor Driver Pin	Arduino
RPWM	D6
LPWM	D7
R_EN	D4
L_EN	D5
VCC	5V
GND	GND

Motor Driver	Connect to
B+ / VCC (motor power)	Battery +
B- / GND	Battery -
Motor terminals	Your motor

Servo Wire	Arduino
Signal (servo1)	D8
Signal (servo2)	D9
VCC	5V (Buck convertor)
GND	GND

Channel	Function
CH1	Servo 2 (steering?)
CH2	Direction (forward/back)
CH3	Speed (throttle)
CH4	Servo 1