Removing plenum off 2000 Maxima

Have any of you guys replaced the Valve cover gasket for the rear (Right) side of the 2000 Maxima? I tried but could not have access to it since I could not remove the Plenum. I removed every bolt and cables/ hoses there was attached to it and I could move only 1?2 inch up by prying with screwdriver. Anyone knows the step? Have pics?
Haynes book only show directions / pics for the 99 and earlier models.
I'd appreciate any help. All of my plugs have oil on it and I need to change the valve cover gasket. Front side is easy but the rear side...

check your PM (top rh corner)

check your PM (top rh corner)

I'm sorry, I didn't understand.
What's PM (top rh corner)?

Thanks