The "T" element can only follow a "C" or another "T" in the path definition.
The orange dot is the last point of the previous element and is the starting point for "T".
"T" is determined by one point.
The little grey point is the point of curvature of the path and it's symmetrical with the green one, in relation to the orange point.
To see what I mean, move the green dot.
The pink point is the ending point.