wings position

[ghiboz]

hi all!
I have a question about the wing position: here is an example of tc6 car:

Code:

[wing.front]
position = 0.0, 0.0, 0.2
frontal-area = 2
drag-coefficient = 0.3

[wing.center]
position = 0.0, 1.9, 0.20
frontal-area = 0.2
drag-coefficient = 0.0
surface-area = 0.3
lift-coefficient = -0.5
efficiency = 0.95

[wing.rear]
position = 0.0, -2.14, 0.37
frontal-area = 0.05
drag-coefficient = 0.0
surface-area = 0.5
lift-coefficient = -1.2
efficiency = 0.95

why the front wing have y = 0.0 (in the middle of the car) and the center wing have 1.9 (about in front of the car)?
in my mind the front and center will be inverted... is there any cause to have this?
thanks in advance!