The 10th & 11th temple chakras are located right behind the temples, as shown above, a bit forward from the tip of the ear, and are extensions of the 6th chakra.
To open these chakras, just turn your attention to each one and visualize it point facing in.
Then do the same on the other side.
A weird feeling of aching, heaviness, pressure, or aching is a positive sign you have correctly located and opened them.
The temple chakras are extensions of the sixth chakra.
The Third Eye – Library of Rickandria
Artwork: Tommaso Portinari and his Wife by Hans Memling, circa 1470