1 - Add to panel.cfg (S81_common/panel) the following entry in [Vcockpit01], after the last gauge.

gauge20=shockwave_lights!SW Lights,  1,1,1,1 	//shockwave light

2 - Modify ALL the Aircraft.cfg files (S81_PX, S81_AR125, S81_AR126, S81_14K) overwriting the [LIGHTS] section with the following entry

[LIGHTS]
//Types: 1=beacon, 2=strobe, 3=navigation, 4=cockpit, 5=landing
light.0 = 3, -5.59, -39.13, 0.06, fx_navred
light.1 = 3, -5.59, 39.16, 0.1, fx_navgre
light.2 = 3, -44.06, 0, 0.87, fx_navwhi
light.3 = 4, 7.2, 0, 2.46, fx_vclight
light.4 = 4,  -16.2,   0,  1, fx_vclight
light.5 = 5, -6.45, 19.19, -2.87, fx_shockwave_landing_light_tail_old,
light.6 = 5, -6.45, -19.19, -2.87, fx_shockwave_landing_light_tail_old,
//light.5 = 5, -6.45, 19.19, -2.87, fx_SM74_landing
//light.6 = 5, -6.55, -19.19, -2.87, fx_SM74_landing
