Evolution of an example binary through the wind-fed HMXB phase under three BH accretion scenarios. The top panels show the evolution of the donor star radius (black solid line), Roche lobe radius (orange dashed line), 0.9 times the Roche lobe radius (orange dotted line), and orbital period (gray solid line). The green and blue areas indicate the duration of the wind-fed BH-HMXB phase before and after MT via RLO, respectively. The plus symbol denotes the end of the MS for the donor star. The bottom panels show the evolution of the BH mass (black solid line), donor star mass (orange solid line), donor star convective core mass (orange dotted line), and BH spin (gray solid line).