We show the distribution of chi-square value for different FeII templates and widths. The left panel represents the chi-square distribution of different templates that have been used to model the UV Fe II emission. The right panel shows the chi-square distribution when various velocity widths (km/s) were chosen to model the UV FeII. The upper panel and lower panel are for HE 0413 and HE 0435 sources. The templates name are the following: BV2: d11-5-m20-20-5.dat, BV3: d11-m05-20-5.dat, BV4: d11-m10-20-5.dat, BV5: d11-m20-20.5-735.dat, BV6: d11-m20-20-5.dat, BV7: d11-m20-20.dat, BV8: d11-m20-21-735.dat, BV9: d11-m20-21.dat, BV10: d11-m30-20-5-735.dat, BV11: d11-m30-20-5.dat, BV12: d11-m50-20-5.dat, d11: d11-m20-20-5.dat, d12: d12-m20-20-5.dat.