I have found two things contradicting the TSB, first I couldn't use right arm to do it, I had to use left arm. second I seriously think in second photo of the TSB the text insert "passage side" should have been driver side, there is no way I could do it the way TSB instructs. I had hard time to snap the top of the cover on, I could only squeeze it hard but didn't feel any click until it refused going in any further. The lower part was easy, I could rotated the cover a bit though, as the TSB asked. It's stuck on the valve pretty good. I hope I did it right.
Haven't tested it yet, but I have to refuel it on the next trip. I'll report back how it goes.
Cover
As how to remove fuel pump youtube has an excellent video, just google:
G35 Sedan Fuel Pump youtube
The parts cost $46.99. The hard part of the job was to maneuver the cover in place since the valve is above the driving shaft hump, and there is a litter space only, but fortunately I have relatively small hands.
Hope this helps out those want to do it themselves.