Wings are designated in the HDV file:
[FRONTWING]
FWRange=(5.0, 1.0, 25) // front wing range
FWSetting=17 // front wing setting
FWMaxHeight=(0.35) // maximum height to take account of for downforce
FWDragParams=(0.0185, 0.001675, 0.00001) // base drag and 1st and 2nd order with setting
FWLiftParams=(-0.346225, -0.0090, 0.000011) // base lift and 1st and 2nd order with setting(-0.318225, -0.0090, 0.000011)
FWLiftHeight=(0.920) // effect of current height on lift coefficient
FWLiftSideways=(0.25) // dropoff in downforce with yaw (0.0 = none, 1.0 = max)
FWPeakYaw=(2.0, 1.0) // angle of peak, multiplier at peak
FWLeft=(-0.05, 0.0, 0.0) // aero forces from moving left
FWRight=(0.05, 0.0, 0.0) // aero forces from moving right
FWUp=(0.0, -0.168, -0.001) // aero forces from moving up
FWDown=(0.0, 0.168, 0.001) // aero forces from moving down
FWAft=(0.0, 0.04, -0.04) // aero forces from moving rearwards
FWFore=(0.0, 0.0, 0.0) // aero forces from moving forwards (recomputed from settings)
FWRot=(0.15, 0.06, 0.22) // aero torque from rotating
FWCenter=(0.00, 0.05, -0.50) // center of front wing forces (offset from center of front axle in ref plane)
[REARWING]
RWRange=(5.0, 1.0, 25) // rear wing range
RWSetting=22 // rear wing setting
RWDragParams=(0.0225, 0.004375, 0.00001) // base drag and 1st and 2nd order with setting
RWLiftParams=(-0.3710835, -0.01002, 0.000010) // base lift and 1st and 2nd order with setting
RWLiftSideways=(0.20) // dropoff in downforce with yaw (0.0 = none, 1.0 = max)(-0.3430835, -0.01002, 0.000010)
RWPeakYaw=(2.0, 1.0) // angle of peak, multiplier at peak
RWLeft=(-0.09, 0.0, 0.0) // aero forces from moving left
RWRight=(0.09, 0.0, 0.0) // aero forces from moving right
RWUp=(0.0, -0.192, -0.002) // aero forces from moving up
RWDown=(0.0, 0.192, 0.002) // aero forces from moving down
RWAft=(0.0, 0.10, -0.10) // aero forces from moving rearwards
RWFore=(0.0, 0.0, 0.0) // aero forces from moving forwards (recomputed from settings)
RWRot=(0.20, 0.10, 0.30) // aero torque from rotating
RWCenter=(0.00, 0.60, 0.35) // center of rear wing forces (offset from center of rear axle at ref plane)
Some cars may not have the actual wing parameters, just the aero forces sections. In such cases you can add the missing lines; you will get the wing effects but no visible wings (which requires editing the 3D models).