Spindle PWM pins?

Hi so my machine uses a parallel port and the spindle speed can apparently be controlled by PWM.  The thing is that there’s only two pins for the spindle control, pin 2 and pin 3.  In my user manual it says pin 2 is Spindle-CW and pin 3 is Spindle-CCW.  Does this mean that the PWM signal also needs to be set to those same pins?  I’m looking at the instructions for PWM spindle speed here  and but don’t understand what I’m supposed to do?  Do I just follow the directions but set the pins to be those same pins 2 and 3 in the hal file?  Thanks

Like in the hal file do I just add:

loadrt pwmgen output_type=0
addf pwmgen.update servo-thread
addf pwmgen.make-pulses base-thread
net spindle-speed-cmd motion.spindle-speed-out => pwmgen.0.value
net spindle-on motion.spindle-on => pwmgen.0.enable
net spindle-pwm pwmgen.0.pwm => parport.0.pin-02-out
# Set the spindle's top speed in RPM
setp pwmgen.0.scale 1800


And

loadrt pwmgen output_type=0
addf pwmgen.update servo-thread
addf pwmgen.make-pulses base-thread
net spindle-speed-cmd motion.spindle-speed-out => pwmgen.0.value
net spindle-on motion.spindle-on => pwmgen.0.enable
net spindle-pwm pwmgen.0.pwm => parport.0.pin-03-out
# Set the spindle's top speed in RPM
setp pwmgen.0.scale 1800

Well hey thanks for your helping us noobies out. I did an experiment where rather than having Spindle-CW going to pin 2 i changed it to Spindle-PWM and left Spindle-CCW on pin 3. Now the spindle starts up when running M3 S1000 only its spinning way faster than 1000 RPM. It also actuates +- about 400RPM and doesn’t sound very good either. I believe the PWM frequency is out of tune. How do I figure out the frequency settings to match for the motor so it spins at the correct speed and doesn’t fluctuate? Again thanks for your help