Is the picture of this position of the navel wheel correct?

[zhangyan]

In book of astral dynamics, it is said that the position of the navel center is at the center point in navel (bellybutton), but the position of the second chakra marked on the picture (Fig. 22a. The primary energy centers (major chakras)) seems to be no longer the position of the navel. Is the second position on this picture the navel center?https://share.weiyun.com/fzBittye

by the way,The position of the thread center is in the center point in base of thread. I understand it is in the lower part of the neck, which is connected with the body. But the position in the figure is on the upper part of the neck, which is connected with the head. Can you tell me where the thread center should be? thank you!