Sota Nova V pump adjustment. How is it done?

I need to adjust the cycle pressure on my Nova V vacuum pump?
Does anyone know how this is done?
I see a plastic plug on the bottom of the vacuum pump box..
Is it accessed thru there??

Many thanks for any help...
Do you have the manual ?

If not, can you find it online ?
It is not covered in the manual...
But I figured it out..
The plastic button hole cover on the bottom of the pump gives you access to the adjustment of the vacuum switch threshold...
One small adjustment and I was cycling correctly again...

"The Dog"
Reddog, as the owner of a Nova V I am curious as to the symptoms that caused the needed adjustment of the cycle pressure. Not enough vaccuum?