The position 0 / Thenar space / webbing in not a common location for a magnet, Here Is the last one I remember
I would just say think about the practicality and useability of this position.
What is your use case?
If you are planning on getting (RFID) implants in the future, you might want to save that position for them!?, infact you might want to do that one first and your xG3 later until you are comfortable with the process.
Of course the choice is yours, but I thought you might want to hear some other perspective.
I don’t have an xG3, but if I did, Position 0 would not be where I would put it
Again, your choice, but MOST people don’t bother with PMK for xSeries installs, unless it is an xG3 in the fingertip (A lot of nerves)
but OTY