Two relays per motor. Wire it this way.
Use two 5-pin relays per motor.
Pins 85 and 87a wire to ground
Pins 87 to Battery positive
Pins 86 connect to switch
Pins 30 to either motor connector
When the relays are not energized, both motor connectors are grounded.
When the switch is moved, one relay switches from ground to battery positive and the motor runs.
Moving the switch the opposite direction will reverse polarity at the motor and the motor runs the opposite direction.
