Where exactly are the 666 and middle chakras?

[स त न म]

Where is the solar plexus/thrid/666/manipura chakra located? It's called the solar plexus chakra but it seems it's not located near the solar plexus but rather above the navel. I've read that it's located at or a little below where you elbow meets the torso if your arms are hanging freely. But people have different arm lengths no? If I follow this rule then this point is right above the navel.

But if you look at this diagram then it's above the solar plexus?

I'm currently in the process of opening my chakras. For the other chakras the area they are located in is not so big as to mistake the position of the chakra but for 666 chakra the area where it could be located is large. And I can't find it'se exact location.

I had the same problem with the middle (anahata) chakra. It's located in the "middle" of the chest but the diagrams I see suggest it's located a little below the "middle of the chest." Like in this diagram it's not the middle?

I am trying to feel the chakras but I'm not even sure if I'm feeling them in the right place? Please help.

 

[OpenMind2]

Vibrate runes/mantras for empowering them while focusing on the inside of your body, in middle of it, in the position of the chakra.

For an example , vibrate AUM while focusing on the inside of your chest.

You will feel at a time your chakra reacting to that energy and will know the EXACT possition.

Also remember INSIDE, not front or back exterior of the body, those are the extensions.