Top: normalised individual fluorescent line profile of the Fe Κα line arising from the accretion disc around the WD in velocity bins of 50 km s⁻¹. The primary X-ray source is located on the WD at a latitude of 30° (i.e. z_s = 0.5 R_WD). Bottom: Normalised individual fluorescent Fe Kα line contributed by the Be decretion disc illuminated by the WD at four orbital phases. The outer Be disc was assumed to follow the structure described by Rubio et al. (2025). The black histograms stand for the conjunction phases with the WD behind (solid line) or in front (dashed line). The blue and red histograms stand for the quadrature phases with the WD moving respectively towards us and away from us.