In the aicraft.cfg, look for this section:
[LIGHTS]
//#1=beacon #2=strobe #3=nav
//#4=cockpit #5=landing #6=taxi
//#7=recog #8=wing #9=logo
light.0 = 3, -14, -21.500, 0.500, fx_navred
light.1 = 3, -14, 21.500, 0.500, fx_navgre
light.2 = 1, 4, 0.0000, 2.800, fx_beacon
light.3 = 6, -21, 2.5000, 2.500, fx_f22burner
light.4 = 6, -21, -2.5000, 2.500, fx_f22burner
light.5 = 2, -16, -23.000, 0.000, fx_Vortices
light.6 = 2, -16, 23.000, 0.000, fx_Vortices
//light.7= 5, 25.0, 0.00, -8.50, fx_llight
light.8= 4, 18.0, 0, 3.0, fx_dsb_vclight_tq
light.9= 4, 18.0, 0, 1.0, fx_dsb_vclight_tq
light.10 = 1, -14, -21.500, 0.500, fx_strobe
light.11 = 1, -14, 21.500, 0.500, fx_strobe
We need to focus on these two lines from that section:
light.3 = 6, -21, 2.5000, 2.500, fx_f22burner
light.4 = 6, -21, -2.5000, 2.500, fx_f22burner
To adjust placement of the A/B change the numbers in these lines,
key as follows:
light# type forward/backwards left/right up/down effect
__________________________________________________________
light.4 = 6, -21, -2.5000, 2.500, fx_f22burner
To make the A/B appear closer to the plane, make the last number smaller. Use SMALL steps!

try to picture an X,Y,Z grid around the aircraft with 0 being at the center of the aircraft.
Hope this helps, if not, let me know!
